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Last updated at Jan. 27, 2020 by Teachoo
Transcript
Ex 1.4,2 Let A = {a, b}, B = {a, b, c}. Is A B? What is A B? A = {a, b} B = {a, b, c} Every element of A is in B. So, A is a subset of B i.e. A B. A B = {a, b} {a, b , c} = {a, b, c}
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