Wednesday

November 26, 2014

November 26, 2014

Posted by **Lost One** on Tuesday, March 5, 2013 at 2:25pm.

Posted by Lost One on Tuesday, March 5, 2013 at 12:04pm.

Let f(x) = (2/3)x^3 - 2x + 1 with a restricted domain of [1,infinity]. What is the value of (f-1)'(x) when x = 13?

•Calc - Steve, Tuesday, March 5, 2013 at 12:58pm

since x = f^-1(y)

and dx/dy = 1/y'

f' = 2x^2-2

(f^-1)'(13) = 1/f'(13) = 1/(2*169-2) = 1/336

Follow up question:

Okay, I see the logic of this now, but I have another problem. This is for a multichoice worksheet, and the four choices are 1/13, 13, 3, & 1/16. Which one is the correct choice?

**Answer this Question**

**Related Questions**

English - Homework Help: English Posted by rfvv on Tuesday, March 12, 2013 at 6:...

Calc - Let f(x) = (2/3)x^3 - 2x + 1 with a restricted domain of [1,infinity]. ...

English - Posted by rfvv on Tuesday, March 12, 2013 at 5:35pm. Posted by rfvv on...

English - Posted by rfvv on Tuesday, November 26, 2013 at 6:56am. a statement ...

math111(3) - The function f(x)=(x+6)^2 is not one-to-one. Choose the largest ...

PreCalc! - sketch a graph whose domain is the interval [0, infinity) but whose ...

Algebra - I know what the answer is just not how to exopress it. Can someone ...

Algebra - I know what the answer is just not how to exopress it. Can someone ...

Algebra - Could you please check my answers and help me with one? Find the ...

Chemistry-pls help - I refer to the following question. Is my explanation ...