English

Evaluate. {(13)-1-(14)-1}-1

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Question

Evaluate.

`{(1/3)^(-1) - (1/4)^(-1)}^(-1)`

Evaluate
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Solution

`{(1/3)^(-1) - (1/4)^(-1)}^(-1) = {(3/1)^1 - (4/1)}^(-1)`    ...`[∵ (a/b)^-m = (b/a)^m]`

= (3 − 4)−1

= (−1)1

= `1/(-1)`

= −1

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Chapter 10: Exponents and Powers - EXERCISE 10.1 [Page 126]

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NCERT Mathematics [English] Class 8
Chapter 10 Exponents and Powers
EXERCISE 10.1 | Q 6. (i) | Page 126

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