Mark (√) against the correct answer in the following:

Question:

Mark (√) against the correct answer in the following:

The range of $f(x)=x+\frac{1}{x}$ is

A. $[-2,2]$

B. $[2, \infty)$

C. $(-\infty,-2]$

D. none of these

 

Solution:

$\mathrm{f}(\mathrm{x})=\mathrm{x}+\frac{1}{\mathrm{x}}$

For this type

Range is

$-2 \leq y \geq 2$

 

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