RD Sharma - Mathematics

Book: RD Sharma - Mathematics

Chapter: 2. Powers

Subject: Maths - Class 8th

Q. No. 8 of Exercise 2.2

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8

By what number should 5-1 be multiplied so that the product may be equal to (-7)-1 ?

Let the number 5-1 shlould be multiplied by


According to the question:


5-1 = (-7)-1


[Using -n = ]



[Using ]


Therefore 5-1 should be multiplied by


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