2/(x+1)≤1解不等式

问题描述:

2/(x+1)≤1解不等式

解不等式2/(x+1)≤1
[2/(x+1)]-1=(-x+1)/(x+1)=-(x-1)/(x+1)≤0,即(x-1)(x+1)≧0,
故得x