求 y= x^2 + 1/x的极值
问题描述:
求 y= x^2 + 1/x的极值
答
y'=2x-1/x^2 令y'=0 x=(1/2)^(1/3) y=(1/2)^(1/3)^2+1/((1/2)^(1/3))
求 y= x^2 + 1/x的极值
y'=2x-1/x^2 令y'=0 x=(1/2)^(1/3) y=(1/2)^(1/3)^2+1/((1/2)^(1/3))