Gujarat BoardEnglish MediumSTD 8MATHSExponents and Powers1 Mark
MCQ
If x be any non-zero integer, then $x{-1}$ is equal to:
A
$\text{x}$
✓
$\frac{1}{\text{x}}$
C
$-\text{x}$
D
$\frac{-1}{\text{x}}$
✓
Answer
Correct option: B.
$\frac{1}{\text{x}}$
B. $\frac{1}{\text{x}}$ Solution:
Using law of exponents, $\text{a}^{-\text{m}}=\frac{1}{a^{\text{m}}}$ [$\because$ a is non-zero integer]
Similarly,
$\text{x}^{-1}=\frac{1}{\text{x}}$
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