# NCERT Solutions Class 11 Maths Chapter 9 Exercise 9.4 Sequences and Series

NCERT solutions for class 11 maths chapter 9 exercise 9.4 Sequences and Series discusses the sum to the ‘n’ terms of some of the special series, like for example, the sum of consecutive natural numbers, the sum of consecutive squares, or cubes of natural numbers.

The NCERT solutions class 11 maths chapter 9 exercise 9.4 consists of 10 questions based on the above concept where the students are asked to find the sum of given sequences with the help of formulas derived in the chapter.

- For, 1 + 2 + 3 +… + n (sum of first n natural numbers)

S_{n }= n(n + 1)/2

- 1
^{2}+ 2^{2}+ 3^{2}+… + n^{2}(sum of squares of the first n natural numbers)

S_{n} = [n(n+1)(2n+1)]/6

- 1
^{3 }+ 2^{3}+ 3^{3}+… + n^{3}(sum of cubes of the first n natural numbers).

S_{n }= [n(n+1)]^{2}/4

The pdf file of the class 11 maths NCERT solutions chapter 9 exercise 9.4 Sequences and Series can be found in the link presented below :

**ā** Download NCERT Solutions Class 11 Maths Chapter 9 Exercise 9.4

**Exercise 9.4 Class 11 Chapter 9 **

### More Exercises in Class 11 Maths Chapter 9

- NCERT Solutions Class 11 Maths Chapter 9 Ex 9.1
- NCERT Solutions Class 11 Maths Chapter 9 Ex 9.2
- NCERT Solutions Class 11 Maths Chapter 9 Ex 9.3
- NCERT Solutions Class 11 Maths Chapter 9 Miscellaneous Exercise

## NCERT Solutions Class 11 Maths Chapter 9 Exercise 9.4 Tips

The NCERT solutions class 11 maths chapter 9 exercise 9.4 Sequences and Series has some of the important derivations of formulas for special sequences as mentioned above. The students are advised to practice those derivations by themselves so as to understand the underlying principles in a better way. This will also help them remember formulas with ease.

The NCERT solutions class 11 maths chapter 9 exercise 9.4 aims at explaining the variety of problems around the special sequences, which will be easier for the students once they go through the text of the book carefully and involve themselves in the regular practice of solved examples.

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