已知集合M={x|x.(x-a-1)<0(x∈R)},N={x²-2x-3≤0},若M∪N=N,求实数a的取值范围.
问题描述:
已知集合M={x|x.(x-a-1)<0(x∈R)},N={x²-2x-3≤0},若M∪N=N,求实数a的取值范围.
答
已知集合M={x|x.(x-a-1)<0(x∈R)},N={x²-2x-3≤0},若M∪N=N,求实数a的取值范围.