Let A = { a , b }, B = { a , b , c }. Is A ⊂ B? What is A ∪ B?

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Solution

The sets are given as A={ a,b } and B={ a,b,c }.

Since all the elements of { a,b } are contained in { a,b,c }, then, it can be said that A⊂B.

Therefore,

A∪B={ a,b,c } =B

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