# NCERT Solutions for Class 11 Maths Chapter 9

NCERT Solutions for Class 11 Maths Chapter 9 Sequences and Series Exercise 9.1, 9.2, 9.3, 9.4 and Miscellaneous are given below to free download in PDF format updated for new academic session 2021-22 free based on latest NCERT Books for 2021-2022.

11th Maths Exercise 9.1, Exercise 9.2, Exercise 9.3, Exercise 9.4 and Miscellaneous Exercise with Supplementary Exercise 9.4 are also available to study online free or session 2021-2022. After passing 10th standard, if someone wants to do directly 12th class, go for NIOS Online Admission. These UP Board Solutions as well as NCERT Solutions 2021-2022 and Offline Apps are appropriate for CBSE as well as MP, UP Board (intermediate) for the academic session 2021-22 onward.## NCERT Solutions for Class 11 Maths Chapter 9

Class: | 11 |

Subject: | Maths |

Chapter 9: | Sequences and Series |

### 11th Maths Chapter 9 Solutions

NCERT Solutions for Class 11 Maths Chapter 9 Sequences and Series all exercises with supplementary and miscellaneous exercise are given below in PDF form updated for new academic session 2021-2022. Join the discussion forum to ask your doubts and share your knowledge with others.

### 11th Maths Chapter 9 Solutions in English Medium

### 11th Maths Chapter 9 Solutions in PDF

- Download Class 11 Maths Exercise 9.1 Solutions
- Download Class 11 Maths Exercise 9.2 Solutions
- Download Class 11 Maths Exercise 9.3 Solutions
- Download Class 11 Maths Exercise 9.4 Solutions
- Download Class 11 Maths Supplementary Exercise 9.4 Solutions
- Download Class 11 Maths Miscellaneous Exercise 9 Solutions
- Class 11 Maths Solutions Main Page

##### When is a sequence said to be a progression?

A sequence is said to be a progression if the term of the sequence can be expressed by some formula.

##### What is meant by real sequence?

A sequence whose range is a subset of R is called a real sequence.

#### Important Terms Related to Sequences & Series

A sequence is a function whose domain is the set N of natural numbers or some subset of it.

In an A.P., the sum of the terms equidistant from the beginning and from the end is always same, and equal to the sum of the first and the last term.

If three terms of A.P. are to be taken then we choose then as a – d, a, a + d.

If four terms of A.P. are to be taken then we choose then as a – 3d, a – d, a + d, a + 3d.

If five terms of A.P are to be taken, then we choose then as: a – 2d, a – d, a, a + d, a + 2d.

##### About 11th Maths Chapter 9

In a G.P., the product of the terms equidistant from the beginning and from the end is always same and equal to the product of the first and the last term.

If each term of a G.P. be raised to some power then the resulting terms are also in G.P.

If a, b, c are in A.P. then 2b = a + c.

If a, b, c are in G.P. then b² = ac.