Question

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Answer 1

225 =25.9 =5^2.3^2 =5^(n-3). 3^(2n-8) => On comparing we get n-3=2 and 2n-8=2 => n=5 .

Answer 2

5^n-3 X 3^2n-8 = 5^2 . x . 3^2

therefore n-3=2

also 2n-8 =2

n-3=2n-8

-n=-5

n=5