How to find the nth rule for a linear sequence 24/04/2019 D. Smith
Find the nth rule for this sequence: 5, 8, 11, 14, 17… Make a table with 5 columns and write the position of the terms – 1st 2nd 3rd 4th etc as the n numbers in the first column n 1 2 3 4 5 24/04/2019 D. Smith
Put the terms into the second column, 5, 8, 11, 14, 17… 2 8 3 11 4 14 17 6 24/04/2019 D. Smith
Find the difference between the terms 8 – 5 = 3 and write it in the third column 1 5 3 2 8 11 4 14 17 6 24/04/2019 D. Smith
Write the difference number multiplied by the n number in the fourth column Term Difference 3n 1 5 3 2 8 6 11 9 4 14 12 17 15 24/04/2019 D. Smith
Write the difference between the value of 3n and the term in the fifth column 1 5 3 2 8 6 11 9 4 14 12 17 15 24/04/2019 D. Smith
The nth rule is: Term = 3n + 2 24/04/2019 D. Smith