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Ncert Solutions for class 11 maths Chapter 9 SEQUENCES AND SERIES is prepared by CBSE STUDENT eCARE Expert to score good marks in class 11. Class 11 maths chapter 9 SEQUENCES AND SERIES contains many topics which are very important to score good in class 11. There are some important topics of Chapter 9 SEQUENCES AND SERIES is mentioned below:

The chapter Sequences and Series belongs to the unit Algebra, that adds up to 30 marks of the total 80 marks. There are 4 exercises along with a miscellaneous exercise in this chapter to help students understand the concepts related to Sequences and Series clearly. Some of the topics discussed in Chapter 9 as follows:

- By a sequence, we mean an arrangement of numbers in definite order according to some rule. Also, we define a sequence as a function whose domain is the set of natural numbers or some subsets of the type {1, 2, 3, ….k}. A sequence containing a finite number of terms is called a finite sequence. A sequence is called infinite if it is not a finite sequence.
- Let a1, a2, a3, … be the sequence, then the sum expressed as a1 + a2 + a3 + … is called series. A series is called finite series if it has a finite number of terms.
- An arithmetic progression (A.P.) is a sequence in which terms increase or decrease regularly by the same constant. This constant is called the common difference of the A.P. Usually, we denote the first term of A.P. by a, the common difference by d and the last term by l. The general term or the nth term of the A.P. is given by an = a + (n – 1) d.
- A sequence is said to be a geometric progression or G.P., if the ratio of any term to its preceding term is same throughout. This constant factor is called the common ratio. Usually, we denote the first term of a G.P. by a and its common ratio by r. The general or the nth term of G.P. is given by an = arn – 1

A student who has mastered the chapter Sequences and Series of Class 11 would also have a strong hold on the concepts related to the chapter, namely Sequence and Series, Arithmetic Progression (A. P.), Arithmetic Mean (A.M.), Geometric Progression (G.P.), general term of a G.P., sum of n terms of a G.P., infinite G.P. and its sum, geometric mean (G.M.) and the relation between A.M. and G.M.

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Ans. Chapter 9 of Class 11 Maths mainly consists of six important sections apart from the introductory part where the entire chapter has been introduced. It further explains the concepts regarding Sequence, Series, Arithmetic and Geometric Progression, correlation between them and sum related to n terms of special series.There are four exercises as well to help you with advanced questions to make your exam preparation better. These sections essentially give away small details that are required to solve relevant problems.

Ans. The Sequence and Series chapter demands a lot of practice to get rid of conceptual errors since it contains lots of difficult sections. The underlying concepts can be a little tricky in the beginning; however, with the right kind of guidance and advanced techniques, achieving a good score is not that difficult.If your goal is to attain full marks in every question related to this chapter, you should consider practising different kinds of tricky questions as well. Class 11 Maths NCERT solutions Sequence and Series contain various fast-solving techniques that keep you aware of the type of questions you will be facing in exams.

Progression is a sequence in which the terms maintain a specific pattern. In Arithmetic Progression, there are two consecutive terms and their difference is constant. To understand these concepts in a better way, students should refer to the NCERT Solutions designed by the expert faculty. Even though the textbook has enough details, opting for a best study material will help students in understanding their applications.