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The sum underset(k=1)overset(20)sum k (1...

The sum `underset(k=1)overset(20)sum k (1)/(2^(k))` is equal to

A

`2-21/(2^(20))`

B

`2-11/(2^(19))`

C

`2-11/(2^(20))`

D

`2-3/(2^(17))`

Text Solution

Verified by Experts

The correct Answer is:
B
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