Check sibling questions

Ex 9.1, 1 - Write first five terms an = n(n + 2) - Chapter 9 - Ex 9.1

Ex 9.1,1 - Chapter 9 Class 11 Sequences and Series - Part 2

This video is only available for Teachoo black users

Introducing your new favourite teacher - Teachoo Black, at only ₹83 per month


Transcript

Ex9.1,1 Write the first five terms of the sequences whose nth term is an = n(n+2) We need to find first five terms i.e. a1, a2, a3 , a4, a5 an = n(n + 2) Putting n = 1 in an a1 = 1(1 + 2) = 1 × 3 = 3 Putting n = 2 in an a2 = 2(2 + 2) = 2 × 4 = 8 Putting n = 3 in an a3 = 3(3 + 2) = 3 × 5 = 15 Putting n = 4 in an a4 = 4(4 + 2) = 4 × 6 = 24 Putting n = 5 in an a5 = 5(5 + 2) = 5 × 7 = 35 Hence first five terms are 3, 8, 15, 24, and 35.

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.