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If S(n) = 1 + 3 + 7 + 13 + 21 + "….." up...

If `S_(n) = 1 + 3 + 7 + 13 + 21 + "….."` upto n terms, then

A

`S_(10) = 340`

B

`T_(10) = 91`

C

`S_(10) = 430`

D

`T_(6) = 31`

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The correct Answer is:
A
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