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CBSE Class 9 Answered

If 102y=25, then 10-y equals ?

Asked by Shreshth Sahu | 17 May, 2014, 12:56: PM
answered-by-expert Expert Answer
G i v e n space t h a t space 10 to the power of 2 y end exponent equals 25 rightwards double arrow open parentheses 10 to the power of y close parentheses squared equals 5 squared rightwards double arrow 10 to the power of y equals 5 rightwards double arrow 10 to the power of minus y end exponent equals 1 fifth
Answered by Vimala Ramamurthy | 17 May, 2014, 04:07: PM

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