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Mathematics 8 Online
OpenStudy (anonymous):

(x) = (x + 8)^2 e^(x + 8)

OpenStudy (anonymous):

f'x

OpenStudy (mertsj):

\[(x+8)^{2}(e)^{x+8}\]

OpenStudy (mertsj):

Is that the problem?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

f '(x) = that problem

OpenStudy (mertsj):

It's the product rule

OpenStudy (anonymous):

yeah, and i got like 8x^5 +3x^3, I dont understand it. i then put it into x-h - x / h and the homework said its wrong

OpenStudy (mertsj):

I got: \[e ^{x+8}(x^2+18x+80)\])

OpenStudy (anonymous):

my homework says its wrong.. :/

OpenStudy (mertsj):

Well, it must want it in a different form because I put it into the computer and it agrees with my result.

OpenStudy (mertsj):

Maybe like this: \[e ^{x+8}(x+8)(x+10)\])

OpenStudy (mertsj):

\[e ^{x+8}+18e ^{x+8}x+80e ^{x+8}\]

OpenStudy (anonymous):

still didnt work

OpenStudy (mertsj):

None of those?

OpenStudy (anonymous):

no :/ maybe the e is supposed to be the 2.*** whatever number it is

OpenStudy (anonymous):

see what you get for this problem f (x) = x^3(8x^2 +3x f ' (x) = ??

OpenStudy (mertsj):

\[40x^4+12x^3\]

OpenStudy (anonymous):

nope :/

OpenStudy (mertsj):

I'll put it in Wolfram and see.

OpenStudy (mertsj):

They gave it in the form 4x^3(10x+3) which is the same thing in a different form

OpenStudy (anonymous):

number one you got right on e^x+8 (x+8) (x+10) i just now saw that

OpenStudy (mertsj):

Well this one is right too. It is such a pain having to match these answers up. Sometimes that is worse than the problem itself.

OpenStudy (anonymous):

I agree! computer math homework is a pain!

OpenStudy (mertsj):

No doubt.

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