Example 1 - Chapter 8 - Predicting What Comes Next: Exploring Sequences & Progress

Last updated at August 14, 2026 by

Example 1 - Consider the expression un = 2n – 1 [Chapter 8 Class 9] - Explicit Rule for a Sequence

part 2 - Example 1 - Explicit Rule for a Sequence - Chapter 8 - Predicting What Comes Next: Exploring Sequences & Progress - Class 9

Take a fresh quiz. Then take another.
Every attempt is a new AI-adaptive Teachoo quiz with 8 questions, selected from your answers, mistakes, and progress.
Remove Ads
Teachoo ยท Class 9 Explore Class 9

Transcript

Example 1 Consider the expression ๐‘ข_๐‘›=2๐‘›โˆ’1. Find the 20th term, the 53rd term, the 300th term Given ๐‘ข_๐‘›=2๐‘›โˆ’1 Now, 20th term = ๐‘ข_20 =2(10)โˆ’1 = 40 โ€“ 1 = 39 53rd term = ๐‘ข_53 =2(53)โˆ’1 = 106 โ€“ 1 = 105 300th term = ๐‘ข_300 =2(300)โˆ’1 = 600 โ€“ 1 = 599

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.

Many students prefer Teachoo Black for a smooth, ad-free learning experience.