Exercise Question 2 (Page 176) - Chapter 8 - Predicting What Comes Next: Exploring Sequences & Progress

Last updated at August 14, 2026 by

Can you write t5, t6, t7 and t8 for the sequence of triangular numbers - Definition

part 2 - Exercise Question 2 (Page 176) - Definition - Chapter 8 - Predicting What Comes Next: Exploring Sequences & Progress - Class 9

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Exercise Question 2 (Page 176) Can you write ๐‘ก_5, ๐‘ก_6, ๐‘ก_7 and ๐‘ก_8 for the sequence of triangular numbers? Our Triangular Numbers are 1, 3, 6, 10, 15, โ€ฆ The pattern here is Difference between terms keeps increasing by 1. We add 2, then add 3, then add 4, then add 5, and so on Here, 5th term = ๐’•_๐Ÿ“ = 15 6th term = ๐’•_๐Ÿ” = 15 + 6 = 21 7th term = ๐’•_๐Ÿ• = 21 + 7 = 28 8th term = ๐’•_๐Ÿ– = 28 + 8 = 36

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