求不等式x+7分之2+1大于3x=2分之2+2的非负整数解_数学解答

求不等式x+7分之2+1大于3x=2分之2+2的非负整数解

人气：373 ℃　时间：2020-06-28 15:56:43

解答

2/(x+7)+1>2/(3x+2)+2,
2/(x+7)-2/(3x+2)-1>0,
[2(3x+2)-2(x+7)-(x+7)(3x+2)]/[(x+7)(3x+2)]>0,
(4x-10-3x^2-23x-14)/[(x+7)(3x+2)]>0,
(3x^2+19x+24)(x+7)(3x+2)