course Mth 151
I just wanted to let you know that watching your CD on sets really clarified things for me. I did not watch them prior to doing the Query ass. 3. I wished I had of. The book does not explain it like you.
conversely, I don't explain a lot of the things the book does. I concentrate on key ideas that I think can be enhanced by some explanations. Good book, but of course hearing and seeing the explanations is a helpful supplement.
Text Ass 2.3
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3) A
5) E
6) D
9) {a,b,c,d,e,f}
10) {b,c}
12) {a,b,c}
15) {d,f}
16) (b.c,d,e,f}
18) (a,b,c)
20) {b,c,d,e,f}
24) {b,e,g}
25) {d,f}
27) {e,g}
30) the elements that A and B have in common after finding what is U that is not in B?orA?33) the elements that are in A that are not in C and the elements in B that are not in C
35) {e,c,h,l,b}
36) {b,l}
39) {e,h,c,l,b}
40) {h}
42) O
45) all tax returns with itemized deductions and showing business income without the returns selected for audit.
48) always true
50) always true
54)not always true
55) a) {1,3,5,2}
b) {1,2,3,5}
57) a) {1,2,3,4,5}
b) {1,2,3,4,5}
60) a) {2,5}
b) {2,4,5}
63) true
65) false
66) false
69) true
70) true
72) (3,6), (3,8), (6,6), (6,8), (9,6), (9,8), (12,6), (12,8)
75) n(AxB) { (2,4), (2,9), (8,4), (8,9), (12,4), (12,9) = 6
n(BxA)= { (4,2), (4,8), (4,12), (9,2), (9,8), (9,12) = 6
78) n(AxB)=65
n(BxA)= 65
80) n(BxA) = 25
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