(3x^2-x-4)/(2+x-x^2)≥x-2

问题描述:

(3x^2-x-4)/(2+x-x^2)≥x-2

比较复杂,亲等下,我给你慢慢打,原不等式化为(3x^2-x-4)/(2+x-x^2)-(x-2)≥0通分得(3x^2-x-4)/(2+x-x^2)-(2x+x^2-x^3-4-2x+2x^2)(2+x-x^2)≥0化简得(3x^2-x-4+x^3-3x^2+4)/(2+x-x^2)≥0然后(x^3-x)/(2+x-x^2)≥0...