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) $\frac{- 1}{x}$

Open in App

Solution

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

Suggest Corrections

Similar questions

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) $\frac{- 1}{x}$

Question 12

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

If x be any non-zero integer and m,n be negative integers, then $x^{m} \times x^{n}$ is equal to:
(a) $x^{m}$
(b) $x^{(m + n)}$
(c) $x^{n}$
(d) $x^{(m - n)}$

Question 13

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

If y be any non-zero integer, then $y^{0}$ is equal to:
(a) 1
(b) 0
(c) -1
(d) Not defined

Question 21

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

For a non-zero integer $x, x^{7} \div x^{12}$ is equal to:
(a) $x^{5}$
(b) $x^{19}$
(c) $x^{- 5}$
(d) $x^{- 19}$

Question 22

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

For a non-zero integer x, $(x^{4})^{- 3}$ is equal to:
(a) $x^{12}$
(b) $x^{- 12}$
(c) $x^{64}$
(d) $x^{- 64}$

Join BYJU'S Learning Program

Explore more

Powers with Negative Exponents

Standard VIII Mathematics

Join BYJU'S Learning Program

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) 1x (c) -x (d) −1x

Using law of exponents ,a−m=1am Similarly, x−1=1x

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) $\frac{- 1}{x}$

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