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January 29, 2015

January 29, 2015

Posted by **Anonymous** on Monday, February 13, 2012 at 6:05pm.

f(x) = 7x^3 + 7x^2/x

f '(x) =

- MATH - Homework dumping -
**Ms. Sue**, Monday, February 13, 2012 at 6:08pmPlease show us how you think these problems should be solved -- or where you're stuck. Do not post any more problems until you've shown us some effort on these other 10 or so problems.

- MATH -
**Anonymous**, Monday, February 13, 2012 at 7:17pm7(3x^3-1)= 21x^2

7(2x^2-1)= 14x

so would it be 21x^2+14x/x

I don't know how to go further than this

- MATH -
**Reiny**, Monday, February 13, 2012 at 7:49pmI don't know the foggiest idea what you are doing.

first of all, I think you probably meant

f(x) = (7x^3 + 7x^2)/x , or else the last term would simply be 7x

from my assumption, then

f(x) = 7x^2 + 7x

f'(x) = 14x + 7

- MATH -
**Anonymous**, Monday, February 13, 2012 at 8:13pmI think i see what i am doing wrong thank you very much :)

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