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Let f(x) = (x + x^(2) + ...+ x^(n)-n)/(x...

Let `f(x) = (x + x^(2) + ...+ x^(n)-n)/(x -1), x ne 1`, the value of f (1)

A

`(n+1)/(2)`

B

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

C

n

D

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

Text Solution

Verified by Experts

The correct Answer is:
D
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