Assertion (A): In an AP, Sn = n² + n then a20 = 40 Reason (R): In an AP d = an – an-1

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Assertion-ReasonRelationship Between nth Term and Sum of Arithmetic Progression

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If the sum of first n terms of an A.P. is given by Sn = n/2 (3n + 1), then the first term of the A.P. is

MCQ (Single)Sum of First n Terms of Arithmetic ProgressionRelationship Between nth Term and Sum of Arithmetic Progression

If the sum of first n terms of an A.P. is given by Sn = n/2(3n + 1), then the first term of the A.P. is

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Sum of First n Terms of Arithmetic Progression

Relationship Between nth Term and Sum of Arithmetic Progression

The sum of first n terms of an AP is 5n² − n. Find the nth term of the AP.

TextSum of First n Terms of Arithmetic ProgressionRelationship Between nth Term and Sum of Arithmetic Progression

Assertion(A): If Sn is the sum of the first n terms of an AP, then its nth term an is given by an = Sn – Sn – 1 Reason (R): The 10th term of the A.P. 5, 8, 11, 14, ………………. is 35.

Assertion-ReasonRelationship Between nth Term and Sum of Arithmetic Progression

If the sum of first n terms of an A.P. is given by Sn = n/2(2n + 8). Then, find its first term and common difference. Hence, find its 15th term.

TextFinding nth Term of Arithmetic ProgressionRelationship Between nth Term and Sum of Arithmetic Progression

In an A.P., the sum of the first 'n' terms is 3n² + n. Find the first term and the common difference of the A.P. Hence, find its 15th term.

TextRelationship Between nth Term and Sum of Arithmetic Progression