Question

The function $f:R\to R$ defined by $f\left(x\right)=|(x-1)(x-2)|$ is

• A. One-one function
• B. Many-one function
• C. Constant function
• D. None of these

Answer 1

The correct option is B Many-one function

We can clearly see that $f\left(x\right)=0$ for $x=1$ and $x=2$
$\therefore f\left(x\right)$ ​​is many-one function.