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Question
If f : A→ B is a bijective function and if n(B) = 7, then n(A) is equal to
If f : A→ B is a bijective function and if n(B) = 7, then n(A) is equal to
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Solution
The correct option is A 7
Bijective Function: If the function 'f' is both one-one and onto then it is called a bijective function.
If f : A → B is a bijective function then n( A ) = n( B )
Given, n( B ) = 7
∴ n( A ) = 7
Bijective Function: If the function 'f' is both one-one and onto then it is called a bijective function.
If f : A → B is a bijective function then n( A ) = n( B )
Given, n( B ) = 7
∴ n( A ) = 7