# Thread: I can't solve Simple algebra problem

1. ## I can't solve Simple algebra problem

I know I'm in calculus but sometimes the algebra kills me.

This is about finding the absolute maximum and minimum. endpoints
X=-8 and x=1

F(x)=x^4/3
f(-8)=(-8)^4/3
f(-8)= ???
How do i solve this step by step,i tried the calculator but its not giving me the right answer, my mathlab says its wrong.

This is an example from my mathlab

F(x)=x^8/3
f(-8)=(-8)^8/3
f(-8)= 256 (I don't know how they got that)

2. Originally Posted by Cyberman86
I know I'm in calculus but sometimes the algebra kills me.

This is about finding the absolute maximum and minimum. endpoints
X=-8 and x=1

F(x)=x^4/3
f(-8)=(-8)^4/3
f(-8)= ???
How do i solve this step by step,i tried the calculator but its not giving me the right answer, my mathlab says its wrong.

This is an example from my mathlab
F(x)=x^8/3
f(-8)=(-8)^8/3
f(-8)= 256 (I don't know how they got that)
$\displaystyle (-8)^{\frac{4}{3}} = [(-8)^{\frac{1}{3}}]^4 = (-2)^4 = 16$

3. Thanks a lot