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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