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Exponents in Fractions

Question 14In...

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Question 14

In the following question, out of the four options, only one is correct. Write the correct answer:

If x be any non-zero integer, then $x^{- 1}$ is equal to:
(a) x
(b) $\frac{1}{x}$
(c) -x
(d) $\frac{- 1}{x}$

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Solution

Using law of exponents , $a^{- m} = \frac{1}{a^{m}}$
Similarly, $x^{- 1} = \frac{1}{x}$

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Exponents in Fractions

Standard VII Mathematics

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