Sequence vs Series

 Sequence 

 Series 

A sequence is defined as a successive arrangement of numbers in an order according to some specific rules. A series is formed by adding the elements of a sequence.
 It is basically a grouping of components that follow a certain pattern.  It is a sum of elements that follow a pattern.
 In a sequence, the order of the numbers is important.    In a series, the order of numbers is not important. 

 Example: 

A finite arithmetic sequence: 3, 5, 7, 9, 11 

 An infinite geometric sequence: 2, 4, 8, 16, ……..  

Example: 

A finite arithmetic series: 3 + 5 + 7 + 9+ 11

An infinite geometric series: 2 + 4 + 8 + 16 + …….. 

Sequences and Series Formulas

Sequences and Series Formulas: In mathematics, sequence and series are the fundamental concepts of arithmetic. A sequence is also referred to as a progression, which is defined as a successive arrangement of numbers in an order according to some specific rules. A series is formed by adding the elements of a sequence.

Let us consider an example to understand the concept of a sequence and series better. 1, 3, 5, 7, 9 is a sequence with five terms, while its corresponding series is 1 + 3 + 5 + 7 + 9, whose value is 25.

This article explores the sequences and series formulas, including arithmetic, geometric, and harmonic series.

Table of Content

  • Sequence and Series Definition
  • Types of Sequences and Series
    • Arithmetic Sequence and Series
    • Geometric Sequence and Series
    • Harmonic Sequence and Series
    • Fibonacci Numbers
  • Sequences and Series Formulas
  • Difference Between Sequences and Series
  • Sequences and Series Formulas Examples

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Sequence and Series Definition

A sequence is defined as a successive arrangement of numbers in an order according to some specific rules. Let x1, x2, x3, x4,… be the terms of a sequence, where 1, 2, 3, 4,… represents the term’s position in the given sequence....

Sequence vs Series

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Types of Sequences and Series

Sequences and series are classified into different types. Some of the most commonly used examples of sequences and series are:...

Sequences and Series Formulas

Arithmetic Progression Geometric Progression Sequence a, (a + d), (a+2d), (a + 3d),………. a, ar, ar2,ar3,…. Series a + (a + d) + (a + 2d) + (a + 3d) +… a + ar + ar2 + ar3 +…. First term a a Common Difference or Ratio Common difference = Successive term – Preceding term                         => d = a2 – a1 Common ratio = Successive term/Preceding term                 => r = ar(n-1)/ar(n-2) nth term a + (n-1)d ar(n-1) Sum of first n terms Sn = (n/2)[2a + (n-1)d] Sn = a(1 – rn)/(1 – r) if r < 1 Sn = a(rn -1)/(r – 1) if r > 1...

Difference Between Sequences and Series

Sequences Series Set of elements follow a pattern Sum of elements of the sequence Order of elements is important Order of elements is not important Finite sequence: 1,2,3,4,5 Finite series: 1+2+3+4+5 Infinite sequence: 1,2,3,4,5…… Infinite Series: 1+2+3+4+5+……...

Sequences and Series Formulas Examples

Problem 1: Using the sequence and series formula, determine the seventh term of the given geometric sequence: 3, 1, 1/3, 1/9, 1/27, 1/81, ___....

Conclusion of Sequence and Series

Sequences and series are fundamental concepts in mathematics, providing a structured way to analyze patterns and summations of numbers. Understanding sequences and series formulas allows us to solve problems involving arithmetic and geometric progressions, calculate sums, and predict future terms. Proficiency in these formulas is essential for tackling complex mathematical challenges in fields such as calculus, algebra, and beyond....

Sequences and Series Formulas – FAQs

What is Importance of Sequences and Series Formulas?...