Mathematics
8 Online
OpenStudy (anonymous):
(x) = (x + 8)^2 e^(x + 8)
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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
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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.
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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
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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
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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.