已知函数f(x)=2mx-m^2+1/(x^2+1)

问题描述:

已知函数f(x)=2mx-m^2+1/(x^2+1)
求当m>0时,函数f(x)的单调区间与极值

f(x)=(x^2+1)/(2mx-m^2+1),(x€r)f(x)导函数f'(x)=[(x^2+1)'(2mx-m^2+1)-(x^2+1)(2mx-m^2+1)']/(2mx-m^2+1)^2=[2x×(2mx-m^2+1)-(x^2+1)×2m]/(2mx-m^2+1)^2=[2mx^2-(2m^2-2)x-2m]/(2mx-m^2+1)^2令f'(x)=0,则[2...