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. One-to-one function
• B. Both a and b
• C. Constant function
• D. Identity function

Answer 1

The correct option is C Constant function

Given:
f = {(a, 3),(b, 3),(c, 3),(d, 3)}
Since, f (x) = 3 for every x $\in$ A
$\Rightarrow$ Range of f ={3}
Thus, f is a constant function.