Gujarat BoardEnglish MediumSTD 8MATHSExponents and Powers1 Mark
MCQ
$3^{-2}$ can be written as$:$
A
$3^2$
✓
$\frac{1}{3^2}$
C
$\frac{1}{3^{-2}}$
D
$-\frac{2}{3}$
✓
Answer
Correct option: B.
$\frac{1}{3^2}$
Using law of exponents, $\text{a}^{-\text{m}}=\frac{1}{\text{a}^\text{m}} [ \because a$ is non$-$zero integer$]$
So, we can write $3^{-2}$ as $\frac{1}{3^2}$.
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