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Все вопросы
- If in an A.P., first term is 20 and 12th term is 120. Find the sum up to 12th term. #681
- If an A.P. is 1,7,13, 19 … Find the sum of 22 terms. #682
- If sum of n terms of an A.P. is n2+5n then find general term. #683
- 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. #684
- 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? #685
- If an A.P. is 3,5,7,9 … Find the 12th term of the A.P. #686
- … It is the most important series we will encounter #687
- Find the sum of first n terms. #688
- Find the sum 1^2+2^2+3^2+ … +10^2. #689
- Find the sum 1^3+2^3+3^3+ … +8^3. #690