Q. 84.6( 7 Votes )

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

Answer :

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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