问题
填空题
设集合M={-1,0,1},N={a,a2},则使M∩N=N成立的实数a的值是______.
答案
∵M={-1,0,1},N={a,a2},M∩N=N,∴N⊊M,∴a=-1,a2 =1,
故答案为-1,
设集合M={-1,0,1},N={a,a2},则使M∩N=N成立的实数a的值是______.
∵M={-1,0,1},N={a,a2},M∩N=N,∴N⊊M,∴a=-1,a2 =1,
故答案为-1,