Question

Let $f:R\to R$ be defined by $f(x)=\frac{1}{x}\forall x\in R$, then $f$ is

• A. one-one
• B. onto
• C. bijective
• D. f is not defined

Answer 1

Answer: (D)

We have, f(x) = $\frac{1}{x}$
When x = 0, then $f\left(0\right)=\frac{1}{0}$ which is meaningless.
Hence, f (x) is not defined.