SOLUTION: find sum of series a - (a + d) + (a + 2d) - (a + 3d) + ----- (2n + 1) terms
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Algebra: Sequences of numbers, series and how to sum them
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Question 621645
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find sum of series a - (a + d) + (a + 2d) - (a + 3d) + ----- (2n + 1) terms
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lynnlo(4176)
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-2d+2n+1