# Solution - Sum of First n Terms of an AP

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ConceptSum of First n Terms of an AP

#### Question

How many terms of the A.P. 65, 60, 55, .... be taken so that their sum is zero?

#### Solution

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#### Similar questions VIEW ALL

If Sn1 denotes the sum of first n terms of an A.P., prove that S12 = 3(S8 − S4).

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The ratio of the sum use of n terms of two A.P.’s is (7n + 1) : (4n + 27). Find the ratio of their mth terms

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Given a = 3, n = 8, S = 192, find d.

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Given a12 = 37, d = 3, find a and S12.

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Given a = 8, an = 62, Sn = 210, find n and d.

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#### Reference Material

Solution for concept: Sum of First n Terms of an AP. For the course 8th-10th CBSE
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