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Все вопросы
- If sum of n terms of an A.P. is n2+5n then find general term. #491
- If 3rd term of an A.P. is 6 and 5th term of that A.P. is 12. Then find the 21st term of that A.P. #492
- In a contest, half the number of experts voted for Mr. A and two thirds voted for Mr. B. 10 voted for both and 6 did not vote for either. How many experts were there in all? #493
- If an A.P. is 3,5,7,9 … Find the 12th term of the A.P. #494
- … It is the most important series we will encounter #495
- Find the sum of first n terms. #496
- Find the sum 1^2+2^2+3^2+ … +10^2. #497
- Find the sum 1^3+2^3+3^3+ … +8^3. #498
- Find the sum of series up to 6^th term whose nth term is given by n^2 + 3^n. #499
- Find the sum up to 7th term of series 2+3+5+8+12+ … #500