Problem on nth term of AP|Sum of first n terms of AP

Introduction|nth term of an AP|Questions|Sum of First n terms of an AP|Questions

Introduction|nth term of an AP|Questions|Sum of First n terms of an AP|Questions

For an AP, it is given that first term (a)= 5 and Common Difference (d) = 3 and nth term = 50. Find n and sum of first n terms of AP

Theory OF Sum OF First n Terms OF A.P

If the sum of first 7 terms of an A.P is 49 and that of its first 17 terms is 289, find the sum of first n terms of the A.P

In an A.P.the sum of m terms of an AP is n and sum of n terms of AP is m,then prove that sum of (m+n) terms of AP is -(m+n)

If the sum of first 7 terms of an A.P. is 49 and that of its 17 terms is 289, find the sum of first n terms of the A.P.

the A.P. nth term of an A.P. is given by (-4n+15). Find the sum of first 20 terms of A.P.

If the sum of the first four terms of an AP is 40 and the sum of the first fourteen terms of an AP is 280. Find the sum of first n terms of the A.P.

If sum of first 20 terms of an A.P. is equal to sum of first 30 terms of the A.P. then sum of the first 50 terms of the A.P. is