Thursday

October 2, 2014

October 2, 2014

Posted by **Reisha** on Wednesday, February 28, 2007 at 5:17pm.

f(x)=4x/(x^2+1)

f(x)=1/(x-2)

take the derivative, set to zero.

the first as an example:

f(x)= 4x (x^2 +1)^-1

f'(x)= 4 (x^2 +1)^-1 -4x(2x)(x^2 +1)^-2

set to zero. Multiply thru by (x^2+1)^2

0=4(x^2+1) - 8x^2

4x^2=1

x= +- 1/2

what about the second question

f(x)1/(x-2)

**Answer this Question**

**Related Questions**

Calculus - Find the relative extrema and absolute extrema if any. Use the first ...

Calculus - Given the function: f(x) = x^2 + 1 / x^2 - 9 a)find y and x ...

Calculus - Given the function: f(x) = x^2 + 1 / x^2 - 9 a)find y and x ...

Calculus - Given the function: f(x) = x^2 + 1 / x^2 - 9 a)find y and x ...

CALCULUS!!! - case 1. Find the absolute maxima and minina values of f(x)=sin2x+...

Calculus--> bobpursley - How do you get m=0? from taking the second ...

calculus - Find the relative extrema of f(x) = -2x^2 + 4x + 3 I don't know how ...

Calculus - Find the relative extrema, if any, of the function. Use the second ...

Math - Find the relative extrema, if any, of the function. Use the second ...

math - Find the relative extrema, if any, of the function. Use the second ...