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| Subject:
Calculus problem
Category: Reference, Education and News > Homework Help Asked by: pedal-ga List Price: $2.00 |
Posted:
28 Mar 2004 07:26 PST
Expires: 27 Apr 2004 08:26 PDT Question ID: 321267 |
f(x) = 20x³ + (7/2)x² + 2x + 3 Find f ''(x) and solve f ''(7) |
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| Subject:
Re: Calculus problem
Answered By: hibiscus-ga on 28 Mar 2004 13:33 PST Rated: |
Hi Pedal,
To find the second derivative, f'', you must first find f' and then
find it's derivative to get f'':
f'(x) = 3*20x² + 2*(7/2)x + 2
= 60x² + 7x + 2
f''(x) = 2(60x) + 7
= 120x + 7
For f''(7) just sub in 7 for x to get:
f''(7) = 120(7) + 7
= 847
That's all there is to it.
Hope this helped you out,
Hibiscus |
pedal-ga
rated this answer:
and gave an additional tip of:
$1.00
Fast response, help was great!!! |
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