Question 2 If the set A has 3 elements and the set B = {3, 4, 5}, then find the number of elements in (A × B)?
Class XI - Relations and Functions Page 33
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1
The both sets have same number of elements in such type of case the no. of the elements of A×B is the square of the no. elements of one set .
i.e. the answer 3² = 9
i.e. the answer 3² = 9
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No of elements in set A = 3
no of elements in set B = 3
so
no of elements in A×B = 3×3 = 9
no of elements in set B = 3
so
no of elements in A×B = 3×3 = 9
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