# IF RATIO OF SUM OF TWO AP'S ARE 7N+2:3N+1.THEN FIND RATIO OF 17TH TERM? PLEASE EXPLAIN IN DETAIL?AND WHEN WILL TOPPER LIVE COURSES WILL START FOR CBSE CLASS 10?

### Asked by abinash.gupta003 | 5th Jul, 2017, 08:15: AM

Expert Answer:

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We are starting Topper Live Classes for CBSE Class 10 from 17th July.

### Answered by Rashmi Khot | 5th Jul, 2017, 09:10: AM

## Concept Videos

- 0.6,1.7,2.8........to100term
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- Sum of first m terms of an A.P. is 0. If a be the first term of the A.P., then the sum of next n terms is : (A) 1 ( ) − − + m a m n m (B) 1 ( ) − − + m a m n n (C) 1 ( ) − − + n a m n n (D) 1 ( ) − − + n a m n m
- Question 1) Find the sum of first 40 positive integers divisible by 6. Question 2) Find the sum of n terms of the series (4-1/n)+4-2/n)+(4-3/n)+........ Question 3) If the sum of the first n terms of an AP is 1/2(3n²+7n), then find its nth term .Hence write the 20 th term .
- A3=15,S10=125,find d and a10
- Find the sum of the first 17 term of an AP whose 4th term = -15 and 9th term = -30.
- The sum of n term of an ap is 4n^2-3n.find 20th term of this ap
- In an A.P sum of the first 2 term is 5 and sum of the last 2 term is 129. Then find the sequence

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