Which of the following is correct - Vidyadip

MCQ

Which of the following is correct

A
$\sqrt {{x^2}} = \,\left| x \right|$
B
${x^{x + 1}}\, = \,x.{x^x}$
C
$\frac{{\left| x \right|}}{x} = \left\{ \begin{array}{l}
1:x > 0\\
- 1:x < 0
\end{array} \right.$
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Answer

Correct option: D.

All

d

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