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underset(xrarr1)"lim"(x+x^(2)+x^(3)+.......

`underset(xrarr1)"lim"(x+x^(2)+x^(3)+.....+x^(n)-n)/(x-1)` =

A

n

B

`(n(n+1))/(2)`

C

`(n(n-1))/(2)`

D

`((n+1))/(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
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