不等式2x+1/1-x大于等于3

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不等式2x+1/1-x大于等于3不等式2x+1/1-x大于等于3不等式2x+1/1-x大于等于3(2x+1)/(1-x)≥3(2x+1)/(1-x)-3≥0[2x+1-3(1-x)]/(1-x)≥0(

不等式2x+1/1-x大于等于3
不等式2x+1/1-x大于等于3

不等式2x+1/1-x大于等于3
(2x+1)/(1-x)≥3
(2x+1)/(1-x)-3≥0
[2x+1-3(1-x)]/(1-x)≥0
(2x+1-3+3x)/(1-x)≥0
(5x-2)/(1-x)≥0
(5x-2)/(x-1)≤0
(5x-2)(x-1)≤0 x-1≠0
2/5≤x