已知集合A={x l x^2+x-6=0},B{x=l mx-1=0} 若B是A 的真子集,求实数m

你好!x² + x - 6 = 0(x-2)(x+3)=0x = 2,x = - 3A={ 2,- 3 }mx - 1 = 0当m=0时,-1=0不成立,B=Φ,是A的真子集当m≠0时,x = 1/m只需 1/m = 2 或 1/m = - 3即 m = 1/2 或 m= - 1/3综上,m= 0,1/2,- 1/3...