The steps to find f''(x)=x^4 - 4x^3

**calcconfused** · March 25th 2009, 04:50 PM

i have the answer as f''(x)=12x^2 - 24x and i am not sure how/why i have that

**Pinkk** · March 25th 2009, 04:54 PM

Do you mean $f(x)=x^{4}-4x^{3}$ ? If so:

$f'(x)=4x^{3}-12x^{2}$
$f''(x)=12x^{2}-24x$

**calcconfused** · March 25th 2009, 04:59 PM

Originally Posted by Pinkk

Do you mean $f(x)=x^{4}-4x^{3}$ ? If so:

$f'(x)=4x^{3}-12x^{2}$
$f''(x)=12x^{2}-24x$

thats what i thought. i think my professor made an error. the original is f(x) = x^4 - 4x^3. he said then that f''(x) = 12x^2 - 24x. that made no sense to me...

**Pinkk** · March 25th 2009, 05:05 PM

Just take the derivative, then take the derivative of the derivative.

Thread: The steps to find f''(x)=x^4 - 4x^3

LinkBack

Thread Tools

Display

The steps to find f''(x)=x^4 - 4x^3

Similar Math Help Forum Discussions

Which steps to use and when to use them ? ?

Find X? show and explain steps to find x

[SOLVED] What are the steps taken to find the f'(x) for...

Find the limits of the following in all steps:

Find x in this equation. I know what x is, but I don't know the steps in getting it!!

Search Tags