Sequences and Series Class 11 CBSE Maths Chapter 9

Class 11 CBSE Maths Syllabus
Chapter 1:Sets
Chapter 2: Relations and Functions
Chapter 3: Trigonometric Functions
Chapter 4: Principles of Mathematical Induction
Chapter 5: Complex Numbers and Quadratic Equations
Chapter 6: Linear Inequalities
Chapter 7: Permutations and Combinations
Chapter 8: Binomial Theorem
Chapter 9: Sequences and Series
Chapter 10: Straight lines
Chapter 11: Conic Sections
Chapter 12: Introduction to 3D
Chapter 13: Limits and Derivatives
Chapter 14: Mathematical Reasoning
Chapter 15: Stastics
Chapter 16: Probability

Introduction

Some of the important points to remember from NCERT Solutions for Maths Class 11 Chapter 9 are as follows:

A sequence is an arrangement of any objects or a set of numbers in a particular order followed by some rule.
(i) A sequence containing a finite number of terms is called a finite sequence.
(ii) A sequence is called an infinite sequence if it is not a finite sequence.
Those sequences whose terms follow certain patterns are called progressions.
(i) A sequence is called an arithmetic progression if the difference of a term and the previous term is always same, i.e., an+1−an=��+1−��=constant for all n∈N�∈�.
(ii) The constant difference d� is called the common difference.
(iii)A sequence is an arithmetic progression if and only if its nth��ℎ term is a linear expression in n� and in such a case the common difference is equal to the coefficient of n.