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The first, second and last terms of an A...

The first, second and last terms of an A.P. are a, b, c respectively, then the sum to first n terms is

A

`b+c- 2a`

B

`(b+c- 2a)/(b-a)`

C

`(b+c +2a)/(b+a)`

D

`((a+c) (b+c- 2a))/(2(b-a))`

Text Solution

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The correct Answer is:
D
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