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in Mathematics by (33.0k points)

The sum first 10 terms of an AP is -150 and the sum of its next 10 terms is -550 . Find the AP

1 Answer

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by (60.2k points)
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Best answer

Let a be the first term and d be the common difference of the AP. Then,

It is given that the sum of its next 10 terms is -550.

Now,

S20 Sum of first 20 terms = Sum of first 10 terms + Sum of the next 10 terms = 

Hence, the required AP is 3, -1, -5, -9,.............

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