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Arithmetic Sequences: Understanding the Concept and Finding the Equation of a Sequence, Lecture notes of Algebra

An introduction to arithmetic sequences, explaining the definition, identifying examples, and demonstrating methods to find the equation of an arithmetic sequence. Students will learn how to determine the common difference, write the equation for the nth term, and find arithmetic means. The document also includes exercises to practice these concepts.

Typology: Lecture notes

2021/2022

Uploaded on 09/12/2022

ekansh
ekansh 🇺🇸

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Download Arithmetic Sequences: Understanding the Concept and Finding the Equation of a Sequence and more Lecture notes Algebra in PDF only on Docsity! 11.2 Arithmetic Sequences Day 1 1 Algebra 2 Intensified:  11.2 Day 1 Notes – Arithmetic Sequences Definition:  An arithmetic sequence is a sequence in which each  term after the first is found by adding a constant, called the common  difference , d, to the previous term. Example 1:  Fill in the next 3 terms.  What is the common  difference?         2, 5, 8, 11, 14, 17, ____, ____, ____   Example 2:  Fill in the next 3 terms.  What is the common  difference?        55, 49, 43, ____, ____, ____ Formula for writing an equation of an arithmetic sequence: The nth term      of an arithmetic sequence with first  term      and common difference      is given by where      is any positive integer. (*     stands for the  number of terms in the sequence) Example 3:  Write an equation for the nth term of the  arithmetic sequence 8, 17, 26, 35, … Method 1: 1st find      and    . 2nd substitute      and      into                                    . 3rd simplify. Method 2: Arithmetic sequences are linear so you can find the  equation using                      . Example 4:   a)  Use either method to find the equation for the  nth term of arithmetic sequence  b)  Find        c)  Find the 120th term. Example 5:  Find the 4 arithmetic means between 16 and 91.   (this means the 4 missing terms between 16 & 91) Method 1: Method 2: Example 6:   Given                 and                 , find the equation of  the arithmetic sequence and find the 3 arithmetic means between  them.
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