Math, asked by paf, 1 year ago

please answer this question

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Answered by TheSam007

2

Given 102y = 25
⇒ (10y)2 = 52
⇒ (10y) = 5
⇒ (10y)-1 = (5)-1
∴ 10-y = (5)-1 = 1/5 ans.

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