Q103 of 196 Page 249

By what number should (–15)–1 be divided so that quotient may be equal to (–15)–1?

Let as assume the number is x.


Let (–15)–1 is divided by x to get the quotient (–15)–1


So,


⇒


Using the law of exponent,


⇒


⇒


Using the law of exponent,


⇒


∴The number is 1


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