Question

若集合M={x|x^2+x-6},N={x|ax-1=0},且N是集合M的子集,求实数a的值

Answer 1

M={-3,2}

N=空集,或{-3},{2}

N=空集时,a=0,

N={-3}时,a=-1/3,

N={2}时,a=1/2,