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in Arithmetic Progression by (50.7k points)
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The sum of first 7 terms of an AP is 10 and that of next 7 terms is 17. Find the AP.

1 Answer

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Best answer

To Find: AP

Given: Sum of first 7 terms = 10

Sum of next 7 terms = 17

According to the problem,

Sum of first 14 terms of the given AP is 10 + 17 = 27.

Solving the equations we get 14a + 42d = 20…(i) and

14a + 91d = 27… (ii)

Subtracting (i) from (ii)we get 49d = 7

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