# Thread: Help Please!!!

1. ## Help Please!!!

Can someone please help me solve this question?

Find the least value of v+6400/v in the domain v>0.

I have no idea....

2. Originally Posted by Emililypad
Can someone please help me solve this question?

Find the least value of v+6400/v in the domain v>0.

I have no idea....
Whoever gave you this problem clearly expects you to know that a maximum or minimum for a differentiable function occurs where the derivative is 0. If f(v)= v+ (6400/v), then $f'(v)= 1- (6400/v^2)$. Set that equal to 0, solve for v, and find f(v) for that vaue of v.