solve this in your notebook and post to me
(81 * 3 ^ (n + 1) - 9 * 3 ^ n)/(81 * 3 ^ (n + 2) - 3 * 3 ^ (n + 2))
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hii...
solution:-- 81*3^n+1-9*3^n/81*3^n+2-3*3^n+2
= 3^n+5-(3^n+2)/3^4*3^n+2-3^n+3
= 3^5*3^n- 1/3^4-3^3*3^n
= 243*3^n- 1/81 - 27*3^n
= 216*3^n - 1/81
= (216*3^n+4 - 1)/ 81
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