If first term, second term and last term...

If first term, second term and last term of an A.P are a,b and 2a respectively then there sum is……

A

`(ab)/(2(b-a))`

B

`(ab)/(b-a)`

C

`(3ab)/(2(b-a))`

D

None of these

Text Solution

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The correct Answer is:

C

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