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If `A(n)` represents the area bounded by the curve `y=n*ln x ` ,where ` n in N and n >1,` the x-axis and the lines `x=1 and x=e ,` then the value of `A(n)+n A(n-1)` is equal to a.`(n^2)/(e+1)` b. `(n^2)/(e-1)` c. `n^2` d. `en^2`

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