已知2(k-2 )

问题描述:

已知2(k-2 )

2k-443k>101
k>101/43
k+1>0

2k-443k>101
k>101/43
所以k+1>0
k(1-x)k-kx(k+1)>k+1
k+1>0
两边除以k+1
x>1

2k-4<45k-105
43k>101
k>101/43
k(1-x)<x-1
k-kx<x-1
(k+1)x>k+1
∵k>101/43
∴k+1>0
∴ x>1.

2(k-2)-1
由k(1-x)