Which of the following is correct
Which of the following is correct
- A
$\sqrt {{x^2}} = \,\left| x \right|$
- B
${x^{x + 1}}\, = \,x.{x^x}$
- C
$\frac{{\left| x \right|}}{x} = \left\{ \begin{array}{l}
1:x > 0\\
- 1:x < 0
\end{array} \right.$ - D
All
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