NCERT Solutions for class 10 Maths Chapter 5 Exercise 5.3 समांतर श्रेढ़ी AP PDF files in * Hindi Medium* and

*for CBSE Board, MP Board, UP Board and the students following*

**English Medium****NCERT Books**for the current session 2018-2019. Download (

**Exercise 5.3**) here in PDF form to use it offline.

## NCERT Solutions for class 10 Maths Chapter 5 Exercise 5.3

### Class 10 Maths Chapter 5 Exercise 5.3 AP Solutions in English

NCERT Solutions for class 10 Maths Chapter 5 Exercise 5.3 Arithmetic Progressions – AP in English Medium to use Online. Click here to move **Class 10 Maths Chapter 5** for other exercises whether download or online study. CLICK HERE for * Hindi Medium* Solutions.

### Class 10 Maths Chapter 5 Exercise 5.3 AP Solutions in Hindi

NCERT Solutions for class 10 Maths Chapter 5 Exercise 5.3 AP – Arithmetic Progressions in Hindi Medium for CBSE & UP Board and other board following NCERT Books. Click here to move **Class 10 Maths Chapter 5** for other exercises whether download or online study. Go back to * English Medium* Solutions.

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**Hindi Medium**

#### Important Questions with Answer for Practice in AP

- The sum of 5th and 9th terms of an A.P. is 30. If its 25th term is three times its 8th term, find the A.P. [Answer: 3, 5, 7, 9, …]
- If Sn, the sum of first n terms of an A.P. is given by Sn = 5n² + 3n, then find its nth term and common difference. [Answer: an = 10n – 2, d = 10]
- The sum of third and seventh terms of an A.P. is 6 and their product is 8. Find the sum of first 16th terms of the A.P. [Answer: 76, 20]
- If the mth term of an A.P. is 1/n and the nth term is 1/m, show the sum of its first (mn) terms is 1/2(mn + 1).
- If in an A.P. the sum of first m terms is equal to n and the sum of first n terms is m, prove that the sum of first (m + n) terms is – (m + n).
- Determine the A.P. whose 4th term is 18 and the difference of 9th term from the 15th term is 30. [Answer: 3, 8, 13, …]
- If the sum of first k terms of an A.P. is 1/2(3k² + 7k), write its kth term. Hence find its 20th term. [Answer: a20 = 62, ak = 3k + 2]
- The sum of first 9 terms of an A.P. is 162. The ratio of its 6th term to its 13th term is 1:2. Find the first and fifteenth terms of the A.P. [Answer: 6, 48]
- If the 10th term of an A.P. is 21 and the sum of its first 10 terms is 120, find its nth term. [Answer: 2n + 1]
- The sum of first 7 terms of an A.P. is 63 and the sum of its next 7 term is 161. Find the 28th term of this A.P. [Answer: 57]

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plz give option to download 10th maths solution