问题
填空题
若A={x|x>12,x∈N},B={x|x<6,x∈N},全集I=N,则CI(A∪B)=______.
答案
∵A={x|x>12,x∈N},B={x|x<6,x∈N},全集I=N,则A∪B={x|x>12,或x<6,x∈R},
∴CI(A∪B)={x|6≤x≤12,x∈R}={7,8,9,10,11},
故答案为 {7,8,9,10,11}.
若A={x|x>12,x∈N},B={x|x<6,x∈N},全集I=N,则CI(A∪B)=______.
∵A={x|x>12,x∈N},B={x|x<6,x∈N},全集I=N,则A∪B={x|x>12,或x<6,x∈R},
∴CI(A∪B)={x|6≤x≤12,x∈R}={7,8,9,10,11},
故答案为 {7,8,9,10,11}.