prove that 3 power n + 3 power n-1 / 3 power n+1 - 3 power n = 2/3
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Step-by-step explanation:
My friend I have written in short write in copy and you can understand it clearly and here 3n means 3^n
3n+3(n-1)/3n+1-3n
3n(1+3^-1)/3n(3-1)
=4/3/2=4/6=2/3
proved
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