若不等式2x若不等式2x
若不等式2x不等式2x
不等式2x<4的解 x<2若a-1<=0则2>x>(a+5)/(a-1),得-10,x<(a+5)/(a-1)(a+5)/(a-1)≥2得a<=7综上所述得1
若a-1<=0,2>x>(a+5)/(a-1),得-10,x<(a+5)/(a-1)(a+5)/(a-1)>=2得a<=7综上所述得1