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Question

Let A = {a,b,c,d} and B = {1,2, 3} and
f = {(a, 3),(b, 3),(c, 3),(d, 3)}. Identify the type of function.

A
Identity function
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B
Both a and b
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C
Constant function
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D
One-to-one function
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Solution

The correct option is C Constant function
Given:
f = {(a, 3),(b, 3),(c, 3),(d, 3)}
Since, f (x) = 3 for every x A
Range of f ={3}
Thus, f is a constant function.

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