# Math Help - Minimum value

1. ## Minimum value

I cannot solve this problem. Please help.

Find the minimum value of:

2X + 1/X^2 when X > 0

2. Originally Posted by chil2e
I cannot solve this problem. Please help.

Find the minimum value of:

2X + 1/X^2 when X > 0
the critical point is $x = 1$

from the second derivative test, we have $f''(1) = 6 > 0$, so it's a local minimum