Question

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

• A. One-one
• B. Onto
• C. Bijective
• D. $f$ is not defined

Answer 1

The correct option is D $f$ is not defined

The function $f\left(x\right)=\frac{1}{x}$ is not defined for $x=0$

But in the question, domain is given $R$

Therefore given function is not defined