已知函数f(x)=x+2^x ,g(x)=x+lnx ,h(x)=x+√x的零点分别为x1、x2、x3,则x1、x2、x3的大小关系是
A、x1<x2<x3
B、x2<x1<x3
C、x1<x3<x2
D、x3<x2<x1
人气:125 ℃ 时间:2019-08-29 04:04:49
解答
f(0)=0+2^0=1,f(-1)=-1+2^(-1)=-1/2,所以 -1
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