Finding x coordinate of absolute min

[gnozahs]

What is the x coordinate of the absolute minimum of 6x + [12/x] when x > 0?

I'm not sure how to derive the equation.

 

[royhaas]

Have you tried $\displaystyle x=1.5$? How about finding the minimum of $\displaystyle 6x + 12/x$?

 

[BigGlenntheHeavy]

$\displaystyle f(x) \ = \ 6x+\frac{12}{x}, \ find \ its \ derivative \ and \ set \ it \ to \ zero.$