In a sequence of 21 terms the first 11 t...

In a sequence of 21 terms the first 11 terms are in A.P. with common difference 2. and the lastterms are in G.P. with common ratio 2. If the middle tem of the A.P. is equal to themiddle term of the G.P., then the middle term of the entire sequence is

A

`-(10)/(31)`

B

`(10)/(31)`

C

`-(32)/(31)`

D

`(32)/(31)`

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The correct Answer is:

D

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