Question

喔剋恁聽

怎麼來的

BCDG
解答: (1){2,3,4,5,6,7,8};(2) {2,3,5,7},
-A
(11)已知n(A) = 7, n(B) = 8, n(AUB) = 12,求n(A - B)的值=( )
7+8=15
(1)
6/
BCE

Answer 1

✨ 最佳解答 ✨

awsx0258

n(A-B)=n(A)-n(A and B)=7-3=4