Question

If the range of a function is a singleton set, then it is A

• A. A constant function
• B. An identity function
• C. A bijective function
• D. An one-one function

Answer 1

The correct option is A A constant function

If the range is a singleton set $\Rightarrow$ for every element in domain, image is same i.e. for every input output remains the same.

Therefore it is a constant function.

Option $\left(A\right)$ is correct.