The minimum value of the function $P(x)=K_1x+\frac{K_2}{x}, (x>0, K_1 > 0, K_2 > 0)$ is :

$\sqrt{K_1K_2}$ $3\sqrt{K_1K_2}$ $2\sqrt{K_1K_2}$ No minimum value is possible

$2\sqrt{K_1K_2}$