# U-union N-intersection.. 1. A-(2,3,4,6,8) B-(1,3,5,6,7) C-(2,3,9) find: A intersection B or A-N-B B intersection C or B-N-C C intersection A or C-N-A 2. (x/x is a letter of the word 'rhythm') (x/x is a vowel letter) (x/x is a letter of the word mathematics) Find: A intersection B or A-N-B (C-A)intersection B or (C-A)-N-B (C-B) (A intersection B) or (C-B) (A-N-B) - this is our assignment...pls answer it immediatly..tnx...

1
by lian003

2015-06-07T12:38:18+08:00

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Intersection
- contains the elements that the sets have in common
Subtraction
- ex. A - B,  all elements of A are present except the intersection of A and B
1.)
A-(2,3,4,6,8)
B-(1,3,5,6,7)
C-(2,3,9)

a.) A intersection B = {3, 6}
b.)
B intersection C = {3}
c.)
C intersection A = {2, 3}

2.)
(x/x is a letter of the word 'rhythm')
(x/x is a vowel letter)
(x/x is a letter of the word mathematics)
Roster method:
A = {R, H, Y, T, M}
B = {A, E, I, O, U}
C = {M, A, H, E, T, I, C, S}
a.)
A intersection B = { }
(C-A)    = {A, E, I, C, S}
b.)
(C-A) intersection B = {A, E, I}                                                                    c.) (C-B) = {M, H, T, C, S}
d.)(A intersection B) = {}