Find the sum of the following A.P.s:
(i) 2, 7, 12, … to 10 terms
(ii) 
t0 11 terms
Solution:
How many terms of the A.P. 27, 24, 21, …, should be taken so that their sum is zero?
Solution:
More Solutions:
- In an A.P. (with usual notations):
- The first term of an A.P. is 5, the last term is 45 and the sum is 400.
- How many terms of the A.P. 25, 22, 19, … are needed to give the sum 116
- Find the sum of first 22 terms, of an A.P. in which d = 7 and a22 is 149.
- If the sum of the first 6 terms of an A.P. is 36.
- If an = 3 – 4n, show that a1, a2, a3, … form an A.P.