Question

19. If the range of a function is a singleton set, then it is
(A) a constant function (B) an identity function
(C) a bijective function (D) an one-one function

Answer 1

Hey.

If the range of a function is a singleton set, then it is
(A) a constant function .

A constant function always gives a single value (y= f(x) = constant) for any value domain(x).

eg. f(x) = 3 .

For any value of x , f(x) will give 3.

So, range is {3} , a singleton function .

Thanks.

Answer 2

Option ( A ) is correct.

The range of a constant function

is Singleton Set .

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