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sum(k=1)^(oo) sum(r=0)^(k) (1)/(3^k) (""...

` sum_(k=1)^(oo) sum_(r=0)^(k) (1)/(3^k) (""^k C_r)=`

A

`1/3`

B

`2/3`

C

1

D

2

Text Solution

Verified by Experts

The correct Answer is:
D
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