Question

已知集合M={y丨y=2^x,x∈R},集合N={y丨y=x^2,x∈R}.求M∩N

Answer 1

集合M={y丨y=2^x,x∈R}, M=(0,+无穷)

集合N={y丨y=x^2,x∈R}. N=[0,+无穷)

M∩N=M=(0,+无穷)