a(x-1)/(x+2) > 1a(x-1)(x+2) > (x+2)^2ax^2+ax-2a > x^2+4x+4(a-1)x^2+(a-4)x-(2a+4) > 0[(a-1)x+(-a-2)](x+2) > 0∵a < 1∴a-1 < 0当(a+2)/(a-1)=-2时a+2=-2a+23a=0a=0∴当a=0时(-x-2)(x+2) > 0(x+2)^2 < 0∴x无解...