Plz plz solve it ....if u can – InterviewSolution

1.

Plz plz solve it ....if u can

Answer»

(5^-1 - 7^-1)^-1

= (1/5^1 - 1/7^1)^-1

= (1/5 - 1/7)^-1

= (7-5/35)^-1

= (2/35)^-1

= 1÷2/35^1

= 1*35/2

= 35/2. ANS.

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