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Exponents and Powers — MATHS STD 8 — Question

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.
$\frac{1}{\text{x}}$
 
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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