The sum of the series a-a-d-a-2d-a-3d-upto 2 n -1 terms isA- -n dB- a -2 n dC- a -n dD- 2 n d

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Sum of n Terms

The sum of th...

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The sum of the series a-(a+d)+(a+2d)-(a-3d)+....upto (2n+1) terms is

-nd

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a+2nd

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a+nd

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2nd

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a - (a + d) + (a + 2 d) - (a + 3 d) + \dots

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