设函数f(x)在[0,无穷)上连续可导,且f(0)=1,|f'(x)|0时,f(x)
问题描述:
设函数f(x)在[0,无穷)上连续可导,且f(0)=1,|f'(x)|0时,f(x)
答
构造F(x)=e^(-x)f(x)
设函数f(x)在[0,无穷)上连续可导,且f(0)=1,|f'(x)|0时,f(x)
构造F(x)=e^(-x)f(x)