Question

by what number should minus 1 by 5 whole to the power minus 1 be multiplied so that the product may be equal to 1 by 5 whole to the power minus 3
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Answer 1

Answer:

Let the required number be x.

Therefore,

(15)

−1

×x=(−5)

−1

15

1

×x=

5

−1

x=−3

Hence, the required number is −3.

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