## Question

###### (A) $2^{n}-n-frac{1}{2}$(B) $1-2^{-n}$(C) $n+2^{-n}-1$(D) $frac{1}{2}left(2^{n}-1ight)$

(A) $2^{n}-n-frac{1}{2}$ (B) $1-2^{-n}$ (C) $n+2^{-n}-1$ (D) $frac{1}{2}left(2^{n}-1 ight)$

## Answers

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