question_answer

Let \[f(x)=\left\{ \begin{align}   & \frac{1}{2},\ if\ 0\le x\le \frac{1}{2} \\  & \frac{1}{3},\ if\ \frac{1}{2}<x\le 1 \\ \end{align} \right.\], then f is [SCRA 1996]

A)            A rational function

B)            A trigonometric function

C)            A step function

D)            An exponential function

Correct Answer: C

Solution :

                   Which is step function.