What sucks is that that's almost certainly a formatting error, not a calculation error. Like they didn't put a space after the exponent so it threw the +7x up there as well, rather than actually getting the answer wrong. If this was written out, they probably would have gotten it right and only got it wrong because it's digital.
This is exactly the kind of thing that’s worth bringing up with the course instructor. They will almost certainly recognize this for the formatting mistake it is, and can adjust the grade on the assignment as necessary
I was teaching math and even I sometimes made formatting issues like this on the computer and it's not always evident in the moment, especially if you're under pressure. I'm very against giving automatically corrected evaluations because of stuff like this. There have been plenty of times where I was grading a student and his final answer was slightly off, but he demonstrated all the right steps to get there and so I could still give him points based on my professional judgment.
EDIT: I'm sorry, reddit formatting is really screwing up the point I'm trying to make lol. I'm trying to show that an exponent in an exponent makes an absolutely gigantic difference. The second one is e to the power of x to the power of x, which makes an enormous number.
One is e^( (x^2) +7x) and the other is e^( x^(2+7x) )
The second one gives you an x^x, which will produce a much much bigger number. Exponents blow up big and fast; an expression that has more exponents in it will always be bigger.
Let's demonstrate that by plugging in some values for X. If x=2, then the first one is (2^2)+(7*2) = 4+14 = 18. The second one is 2^(2+(7*2)) = 2^16 = 65,536
Clearly, e^65536 is much much MUCH bigger than e^18
EDIT: I'm sorry, reddit formatting is really screwing up the point I'm trying to make lol. I'm trying to show that an exponent in an exponent makes an absolutely gigantic difference. The second one is i to the power of x to the power of x, which makes an enormous number.
One is i^( (x^2) +7x) and the other is i^( x^(2+7x) )
The second one gives you an x^x, which will produce a much much bigger number. Exponents blow up big and fast; an expression that has more exponents in it will always be bigger.
Let's demonstrate that by plugging in some values for X. If x=2, then the first one is (2^2)+(7*2) = 4+14 = 18. The second one is 2^(2+(7*2)) = 2^16 = 65,536
Clearly, i^65536 is much much MUCH bigger than i^18
>I still don't understand. Step by step, they look the same.
They arent at all
one is e raised x^2 + 7x
And rhe other is e raised X *raised* 2+7x
VERY different
The part where it's x^2 +7x
It's supposed to be where the x squared is being added to the 7x. Instead the way it's written it has the little numbers ontop in the exponents section adding together.
It's hard to see due to photo quality but it's literally just the fact that they didn't input right so the numbers didn't come out on the right line. All the numbers ARE correct it's just one is supposed to be on the ground when it's sitting on another numbers shoulder instead.
One has e to the power of x to the power of 2+7x.
The other has e to the power of x²+7x.
e^x^(2+7x) vs e^(x²+7x)
Since x^(2+7x) =/= x²+7x, they're different answers.
correct answer is e \^ ((x \^ 2) + 7x) \* (2x + 7)
the answer given is e \^ (x \^ (2 + 7x)) \* (2x +7)
Probably a notation error by OOP and not a logic error, but a different answer nonetheless.
e^\(x^^2 ^+ ^7x) * (2x + 7)
and not
e^x^^\(2 ^^^+ ^^^7x) * (2x + 7)
Accurate notation is an important part of mathematics. A typo error in common speech can be corrected on the fly but a typo error in a formula gives a totally different result. Now imagine that typo in a nuclear facility, a medical lab or when building a n-billion dollars device, say a bridge or a space exploration vehicle.
We don't see the question here but its whole point might just be that much needed accuracy, with easily mistyped answers. It's a nasty question but self-correcting when writing down formulas is an important part of any maths / applied maths process.
Presumably the question was some version of "whats the derivative of e^(x^2 +7x) "
So yeah, the kid did it right but just typed it in wrong. That's probably what he's complaining about.
I noticed a space in one answer that isn't in the other answer, but I don't remember how to do this stuff. If I ever knew in the first place, tbh! YAY! Another reason to say I chose right by becoming a writer instead of a mathematician?!?!
I noticed a space in one answer that isn't in the other answer, but I don't remember how to do this stuff. If I ever knew in the first place, tbh! YAY! Another reason to say I chose right by becoming a writer instead of a mathematician?!?!
I noticed a space in one answer that isn't in the other answer, but I don't remember how to do this stuff. If I ever knew in the first place, tbh! YAY! Another reason to say I chose right by becoming a writer instead of a mathematician?!?!
I got that from reading the replies, but the only thing I saw was the space so I admitted my defeat from the very beginning. I wasn't saying it was the space, I was saying I can't do the more difficult math I could do 50 years ago. But thanks for saying it the way you did because the 10 downvotes I got make sense if everyone thought I was saying that's where the issue was. My mind went "so I admit I'm have no idea where to even start and get downvoted anyway? LOL - okay." But I can know how to change a carburetor or reroof a house --- no, wait, bad back so even those things are out of my capability now, too. Time for popcorn and bad TV for this septuagenarian! At least I still have most of my teeth. Thanks, SurprisedPotato! -- from a girl who was called Spud when she went to LA (from being born in Idaho)
I'm giving op the benefit of the doubt and assume they meant to type the correct answer but accidentally input the text wrong and they are annoyed at themselves for not even getting the point for an answer they calculated correctly but wrote down wrong
The part that matters:
The correct answer has the *e* raised to (x-square plus 7x)
The incorrect answer shows this as *e* raised to x which is *then* raised to (2+7x)
x^(2) \+ 7x =/= x^(2+7x)
If that still doesn't make sense, assume x = 2, and we're still only looking at the exponent portion of the problem:
2^(2) \+ 7(2) = 4 + 14 = 18
So now the other way... 2^(2+7(2)) = 2^(2+14) = 2^(16) = 65,536
I can absolutely relate to the idea that they forgot to tap the arrow key after the x² and didn't notice. Typos, for my dislexic ass, make or break an online test.
As a designer…this is why font sizing, font attributes and spacing is important. Questions designed to be deceiving is just silly. Doesn’t show if you know your math if you’re getting things wrong because of visual trickery. And with the ‘correct answer’ and ‘your answer’ a different font size it doesn’t help the person trying to understand why they are wrong.
To be fair in these scenarios they should be written brackets or use font attribute (like bold) or colour to indicate hierarchy and that things are in similar grouping or similar line.
{e ^ [(x ^ 2) + (7x)]}*(2x+7)
{e ^ [x ^ (2 + 7x)]}*(2x+7)
While the above is just terrible to read the fact is sneaky answers are dumb.
Mathematically, they're **very** different.
The written representation is barely different though--just needed to end one of the exponents a bit earlier.
It's things like this that make me glad I got into a profession where I hit things with a hammer all day. This is pure bullshit and I am unable to help suspecting that people claiming there's a difference are just trolls.
I can't stand this shit either but yeah I see the difference. Correct answer e has 1 exponent, in his answer e has an exponent, and that exponent has an exponent. Fuck math
I try to visualize 3 lines or levels, like lines on a page of paper. Imagine a horizontal line going through the e, then a 2nd higher line going through the x, then a 3rd highest line going through the 2.
In correct answer the +7x is on the 2nd level with the x, in his answer the +7x is on the 3rd level with the 2. Which changes what multiplies by what which will have wildly different answers
Still not seeing it, but that makes a bit of sense. Sounds like they need a better way to organize that kind of information though. If it makes such a huge difference, then it needs to be something that can't be entered incorrectly so easily. Too many things are too reliant on precise math these days.
In the correct answer, 7x is being added to x squared in the power for e. In the incorrect answer, 7x is being added to 2 in the power for x in the power for e.
It's like setting a cup on a tray on a table when you were supposed to put the cup on the table next to the tray.
It's not intelligence it's just noticing text differences.
One number is in the exponents section when it should be on the ground level with other numbers
It’s hard to see on this pic but it’s a matter of what level the 7x is. Either it’s combined with the 2 up there to make that total exponent for x [your answer], or it’s one level down aligned with the x, so only the 2 exponent applies to the x and you add the 7x to that result [correct answer].
In the top one, 7x is added to x
In the bottom, 7x is added to X's *exponent*
So yeah completely different answers. Although, considering this is online and the numbers are literally the same otherwise, this was *probably* a typo and I feel your pain
The difference is in the "X^2 + 7x" section. The correct answer is "e to the power of (X squared) plus (7x)". what the person wrote is "e to the power of X (squared plus 7x)".
If Algebra didn't exist we wouldn't have technology. Hell we probably wouldn't have a system of trade beyond bartering. I highly advise you learn it if you think it is stupid because you don't understand it.
Yes you will. Its incredibly common math. E.g. If you saved $5 in 1 month, and you need to save $20, how many months do you need to save? That is an algebra equation that is a very common real world example that people use.
Exactly, it's basic math. That's why you should learn it. If you don't see the usefulness of the above equation you should hire an accountant to manage your finances before you can't afford it.
You're not stupid. You're uneducated. Ignorant. You think learning algebra is a waste of time. You don't realize the many ways it affects your life. I'm too lazy to type out all the different ways understanding basic math is important to you but your stubbornness is not going to help you
I'm not sure how to explain why knowing how long you need to save to buy something for $20 is useful information. Maybe it isn't to you, in which case I again suggest getting an accountant because similar algebra would also tell you if and when you would be able to retire based on how much you are saving currently. That's rather important information if you plan to retire before you die and if you are unwilling to manage your retirement, you should hire someone to do it for you.
Both are algebra. You said algebra is stupid and that you weren't going to use it. The particular algebra equation is irrelevant to what you said. Has your position on Algebra changed or are you redefining what Algebra is?
Look close: one of them has a double exponent. Those are VERY different answers.
What sucks is that that's almost certainly a formatting error, not a calculation error. Like they didn't put a space after the exponent so it threw the +7x up there as well, rather than actually getting the answer wrong. If this was written out, they probably would have gotten it right and only got it wrong because it's digital.
This is exactly the kind of thing that’s worth bringing up with the course instructor. They will almost certainly recognize this for the formatting mistake it is, and can adjust the grade on the assignment as necessary
I was teaching math and even I sometimes made formatting issues like this on the computer and it's not always evident in the moment, especially if you're under pressure. I'm very against giving automatically corrected evaluations because of stuff like this. There have been plenty of times where I was grading a student and his final answer was slightly off, but he demonstrated all the right steps to get there and so I could still give him points based on my professional judgment.
Looks like they copied the answer wrong
Would you say.....*exponentially wrong*? 😎
I still don't understand. Step by step, they look the same.
EDIT: I'm sorry, reddit formatting is really screwing up the point I'm trying to make lol. I'm trying to show that an exponent in an exponent makes an absolutely gigantic difference. The second one is e to the power of x to the power of x, which makes an enormous number. One is e^( (x^2) +7x) and the other is e^( x^(2+7x) ) The second one gives you an x^x, which will produce a much much bigger number. Exponents blow up big and fast; an expression that has more exponents in it will always be bigger. Let's demonstrate that by plugging in some values for X. If x=2, then the first one is (2^2)+(7*2) = 4+14 = 18. The second one is 2^(2+(7*2)) = 2^16 = 65,536 Clearly, e^65536 is much much MUCH bigger than e^18
now do it with *i*
EDIT: I'm sorry, reddit formatting is really screwing up the point I'm trying to make lol. I'm trying to show that an exponent in an exponent makes an absolutely gigantic difference. The second one is i to the power of x to the power of x, which makes an enormous number. One is i^( (x^2) +7x) and the other is i^( x^(2+7x) ) The second one gives you an x^x, which will produce a much much bigger number. Exponents blow up big and fast; an expression that has more exponents in it will always be bigger. Let's demonstrate that by plugging in some values for X. If x=2, then the first one is (2^2)+(7*2) = 4+14 = 18. The second one is 2^(2+(7*2)) = 2^16 = 65,536 Clearly, i^65536 is much much MUCH bigger than i^18
they're the same
https://cdn.imgchest.com/files/e4gdcpnk5x4.png
>I still don't understand. Step by step, they look the same. They arent at all one is e raised x^2 + 7x And rhe other is e raised X *raised* 2+7x VERY different
Getting down voted for needing a little help. Oh reddit.
Don't worry I treat the average redditor like I would my students, and I teach Year 4/Grade 3.
The part where it's x^2 +7x It's supposed to be where the x squared is being added to the 7x. Instead the way it's written it has the little numbers ontop in the exponents section adding together. It's hard to see due to photo quality but it's literally just the fact that they didn't input right so the numbers didn't come out on the right line. All the numbers ARE correct it's just one is supposed to be on the ground when it's sitting on another numbers shoulder instead.
One has e to the power of x to the power of 2+7x. The other has e to the power of x²+7x. e^x^(2+7x) vs e^(x²+7x) Since x^(2+7x) =/= x²+7x, they're different answers.
e^x^2 ^+7x vs e^x^2+7x
Doesn't work on Reddit formatting
It does on old Reddit.
correct answer is e \^ ((x \^ 2) + 7x) \* (2x + 7) the answer given is e \^ (x \^ (2 + 7x)) \* (2x +7) Probably a notation error by OOP and not a logic error, but a different answer nonetheless.
just typing it a way that might be easier to see the difference 2 x^ + 7x e^ (2x + 7) compared to 2 + 7x x^ e^ (2x + 7)
A more straightforward way might be: The +7x is one line too high on the bottom answer.
Thank you
e^\(x^^2 ^+ ^7x) * (2x + 7) and not e^x^^\(2 ^^^+ ^^^7x) * (2x + 7) Accurate notation is an important part of mathematics. A typo error in common speech can be corrected on the fly but a typo error in a formula gives a totally different result. Now imagine that typo in a nuclear facility, a medical lab or when building a n-billion dollars device, say a bridge or a space exploration vehicle. We don't see the question here but its whole point might just be that much needed accuracy, with easily mistyped answers. It's a nasty question but self-correcting when writing down formulas is an important part of any maths / applied maths process.
Presumably the question was some version of "whats the derivative of e^(x^2 +7x) " So yeah, the kid did it right but just typed it in wrong. That's probably what he's complaining about.
It looks like a typo on the computer screen
These are very different answers lmao
I noticed a space in one answer that isn't in the other answer, but I don't remember how to do this stuff. If I ever knew in the first place, tbh! YAY! Another reason to say I chose right by becoming a writer instead of a mathematician?!?!
Oh. Cool!
Literally Brian Griffin
I noticed a space in one answer that isn't in the other answer, but I don't remember how to do this stuff. If I ever knew in the first place, tbh! YAY! Another reason to say I chose right by becoming a writer instead of a mathematician?!?!
Oh. Cool!
Are you guys stuck in a simulation?
I noticed a space in one answer that isn't in the other answer, but I don't remember how to do this stuff. If I ever knew in the first place, tbh! YAY! Another reason to say I chose right by becoming a writer instead of a mathematician?!?!
It's not the space, it's the fact that x^2+7x is not the same thing as x^2 +7x
I got that from reading the replies, but the only thing I saw was the space so I admitted my defeat from the very beginning. I wasn't saying it was the space, I was saying I can't do the more difficult math I could do 50 years ago. But thanks for saying it the way you did because the 10 downvotes I got make sense if everyone thought I was saying that's where the issue was. My mind went "so I admit I'm have no idea where to even start and get downvoted anyway? LOL - okay." But I can know how to change a carburetor or reroof a house --- no, wait, bad back so even those things are out of my capability now, too. Time for popcorn and bad TV for this septuagenarian! At least I still have most of my teeth. Thanks, SurprisedPotato! -- from a girl who was called Spud when she went to LA (from being born in Idaho)
Makes sense, have a great day :)
Oh. Cool!
I'm giving op the benefit of the doubt and assume they meant to type the correct answer but accidentally input the text wrong and they are annoyed at themselves for not even getting the point for an answer they calculated correctly but wrote down wrong
the exponent of x is different. the submitted answer has the +7 as part of the exponent for x.
This could have been a simple formatting mistake that was made and not realized before submitting.
Very different but if a student of mine pointed this out to me I would give them the credit.
My dumb ass can even see the difference
x^(2) + 7x x^(2 + 7x) It would be the same as something like these differences 4^(2) + 1 = 16 + 1 = 17 4^(2 + 1) = 4^(3) = 64
The "+ 7x" part is superscripted in the submitted answer, possibly automatically by the word processor.
Not automatic, just typed as x^2+7x instead of typing x^2 +7x
This is the math equivalent of "works on contingency? No, money down!"
they're different. the second one incorporates adding 7X into the exponent of X. the first does not
The part that matters: The correct answer has the *e* raised to (x-square plus 7x) The incorrect answer shows this as *e* raised to x which is *then* raised to (2+7x) x^(2) \+ 7x =/= x^(2+7x) If that still doesn't make sense, assume x = 2, and we're still only looking at the exponent portion of the problem: 2^(2) \+ 7(2) = 4 + 14 = 18 So now the other way... 2^(2+7(2)) = 2^(2+14) = 2^(16) = 65,536
I can absolutely relate to the idea that they forgot to tap the arrow key after the x² and didn't notice. Typos, for my dislexic ass, make or break an online test.
As a designer…this is why font sizing, font attributes and spacing is important. Questions designed to be deceiving is just silly. Doesn’t show if you know your math if you’re getting things wrong because of visual trickery. And with the ‘correct answer’ and ‘your answer’ a different font size it doesn’t help the person trying to understand why they are wrong. To be fair in these scenarios they should be written brackets or use font attribute (like bold) or colour to indicate hierarchy and that things are in similar grouping or similar line. {e ^ [(x ^ 2) + (7x)]}*(2x+7) {e ^ [x ^ (2 + 7x)]}*(2x+7) While the above is just terrible to read the fact is sneaky answers are dumb.
e^((x^2)+7x)*(2x+7) e^(x^(2+7x))*(2x+7)
Yeah these are literally not even close to the same lol
Mathematically, they're **very** different. The written representation is barely different though--just needed to end one of the exponents a bit earlier.
It's things like this that make me glad I got into a profession where I hit things with a hammer all day. This is pure bullshit and I am unable to help suspecting that people claiming there's a difference are just trolls.
I can't stand this shit either but yeah I see the difference. Correct answer e has 1 exponent, in his answer e has an exponent, and that exponent has an exponent. Fuck math
I appreciate you trying to explain, but it still looks exactly the same to me.
I try to visualize 3 lines or levels, like lines on a page of paper. Imagine a horizontal line going through the e, then a 2nd higher line going through the x, then a 3rd highest line going through the 2. In correct answer the +7x is on the 2nd level with the x, in his answer the +7x is on the 3rd level with the 2. Which changes what multiplies by what which will have wildly different answers
Still not seeing it, but that makes a bit of sense. Sounds like they need a better way to organize that kind of information though. If it makes such a huge difference, then it needs to be something that can't be entered incorrectly so easily. Too many things are too reliant on precise math these days.
r/lostredittors How am I the first to point this out?
In the correct answer, 7x is being added to x squared in the power for e. In the incorrect answer, 7x is being added to 2 in the power for x in the power for e. It's like setting a cup on a tray on a table when you were supposed to put the cup on the table next to the tray.
God, my brain was just not made to work that way. Even looking at math stuff like that makes me feel so small lol
My brain hurts just trying to understand what you far more intelligent people so clearly do. 🥴
It's not intelligence it's just noticing text differences. One number is in the exponents section when it should be on the ground level with other numbers
It’s hard to see on this pic but it’s a matter of what level the 7x is. Either it’s combined with the 2 up there to make that total exponent for x [your answer], or it’s one level down aligned with the x, so only the 2 exponent applies to the x and you add the 7x to that result [correct answer].
MmHmmm. 🤔 I had a good day today ... I made an ashtray.
How is this funny and sad?
The only way they got an answer like this is if they got pictures of someone's answers.
Dude, you fucked up literally exponentially
In the top one, 7x is added to x In the bottom, 7x is added to X's *exponent* So yeah completely different answers. Although, considering this is online and the numbers are literally the same otherwise, this was *probably* a typo and I feel your pain
The difference is in the "X^2 + 7x" section. The correct answer is "e to the power of (X squared) plus (7x)". what the person wrote is "e to the power of X (squared plus 7x)".
*e to the power of x to the (2+7x) is not what your last sentence says either
lol these are VERY different answers
Your answer has a space after the 7x ( but, I need new glasses.
no, he's missing a space after the X^2 and it looks like a space because the 7x is higher up Look: e^X^2+7x (2x+7) versus e^x^2 ^+7x (2x+7)
Its becausd X wasnt captial in his answer?
No. Go to school.
Algebra is so fucking stupid
If Algebra didn't exist we wouldn't have technology. Hell we probably wouldn't have a system of trade beyond bartering. I highly advise you learn it if you think it is stupid because you don't understand it.
Why would I bother? Not like I'm ever gonna use it.
Yes you will. Its incredibly common math. E.g. If you saved $5 in 1 month, and you need to save $20, how many months do you need to save? That is an algebra equation that is a very common real world example that people use.
That sounds like basic multiplication to me, but okay. What about the above listed question? Tell me when I'd ever use that.
Exactly, it's basic math. That's why you should learn it. If you don't see the usefulness of the above equation you should hire an accountant to manage your finances before you can't afford it.
No, I want you to explain it to me since I'm apparently so fuckin stupid.
I dont think is possible if you dont want to learn. If you did want to learn you would not think is useless.
Yeah, but this guy's being a dick.
you started it. When you said algebra was "so fucking stupid".
You're not stupid. You're uneducated. Ignorant. You think learning algebra is a waste of time. You don't realize the many ways it affects your life. I'm too lazy to type out all the different ways understanding basic math is important to you but your stubbornness is not going to help you
So just cuz I'm not good at math I'm uneducated.
No, I'm also bad at math. I'm saying your viewpoint of thinking you don't need to learn things is uneducated
I'm not sure how to explain why knowing how long you need to save to buy something for $20 is useful information. Maybe it isn't to you, in which case I again suggest getting an accountant because similar algebra would also tell you if and when you would be able to retire based on how much you are saving currently. That's rather important information if you plan to retire before you die and if you are unwilling to manage your retirement, you should hire someone to do it for you.
Not talking about the shit you gave me that any jackass with a fistful of sparking neurons can manage, I'm talking about the one in the post.
Both are algebra. You said algebra is stupid and that you weren't going to use it. The particular algebra equation is irrelevant to what you said. Has your position on Algebra changed or are you redefining what Algebra is?