Question

Could someone show me how to find the absolute extrema for the function f(x)=(4/x)+ tan(πx/8) on the interval [1,2]?

Answer 1

ok so we do the same as before

Answer 2

find f'(x)

Answer 3

set it equal to zero

Answer 4

find the x's that satisfy f'(x)

Answer 5

then plug them back into your original equation to get your y values

Answer 6

find f' and put the values of ur intrval and find abolute max

Answer 7

I run into some confusion when I do find the derivative... I came up with
f'(x)=(-4/x^2) + sec^2(πx/8) + tan(π/8)...
Am I on the right track?