The sum of the series a-(a+d)+(a+2d)-(a+...

The sum of the series `a-(a+d)+(a+2d)-(a+3d)+` up to `(2n+1)` terms is `-n d` b. `a+2n d` c. `a+n d` d. `2n d`

` a+ an`

2nd

`a + nd`

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AAKASH INSTITUTE-SEQUENCES AND SERIES -Assignment (SECTION - A) One option is correct

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