函数f(x)=1/3x^3+ax^2+2bx+c有两个极值点x1,x2,且x1,x2满足-1
问题描述:
函数f(x)=1/3x^3+ax^2+2bx+c有两个极值点x1,x2,且x1,x2满足-1
答
f'(x)=x^2+2ax+2b∵f(x)有两个极值点x1,x2,∴f'(x)有两个零点∵-1<x1<x2<2,∴-1<-a<2 ==>-2<a<1 &n...