1.

` (log x + log x^(4) + log x^(9) +...+ log x^(n^(2)))/(log x + log x^(2) + log x^(3) + ...+ log x^(n))`बराबर हैA. `(2n+1)/3`B. 2n+1C. `(3(n+2))/2`D. `(3(n-1))/2`

Answer» Correct Answer - A
दिया है , `((1+4 + 9 +...+n^(2))log x)/((1+2+3+...+n)logx)`
` = (sumn^(2))/(sumn) =((n(n+1)(2n+1))/6)/((n(n+1))/2)=(2n+1)/3`


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