Question

Find the absolute minimum value and the absolute maximum value, if any of the following function. f(x)=1/(x^2+2x+7) on [-2,1]
(Calculus)

Answer 1

to find extrema, take the derivative and set it =0 to find critical points

Answer 2

I've done that, but what do I do after it's been set to zero? I know the derivative form is -(2x+2)/(x^2+2x+7) = 0

Answer 3

use that value of the x and subs it in actual function. after that in order to maximum and minimum value use "sign test".

Answer 4

or u can find second derivative of the function and subs the value of x in. if the ans is positive and its minimum or when its negative value it'll be maximum. hope this help