Q3 of 86 Page 17

If A and B are two sets such that A ⊂ B, then what is A ∪ B?

It is given in the question that, A and B are two sets such that,


Let us take, A = {a, b}


And, B = {a, b, c} we have:



More from this chapter

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1

Find the union of each of the following pairs of sets:

(i) X = {1, 3, 5} Y = {1, 2, 3}


(ii) A = [ a, e, i, o, u} B = {a, b, c}


(iii) A = {x: x is a natural number and multiple of 3}


B = {x: x is a natural number less than 6}


(iv) A = {x: x is a natural number and 1 < x ≤ 6}


B = {x: x is a natural number and 6 < x < 10}


(v) A = {1, 2, 3}, B = ϕ

 2

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

 4

If A = {1, 2, 3, 4}, B = {3, 4, 5, 6}, C = {5, 6, 7, 8} and D = {7, 8, 9, 10}; find:

(i) A ∪ B


(ii) A ∪ C


(iii) B ∪ C


(iv) B ∪ D


(v) A ∪ B ∪ C


(vi) A ∪ B ∪ D


(vii) B ∪ C ∪ D

 5

Find the intersection of each pair of sets of question 1 above.