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Example 2 - Chapter 9 Class 11 Sequences and Series (Term 1)
Last updated at March 22, 2023 by Teachoo
Examples
Example 1 (i)
Example 1 (ii)
Example 2 You are here
Example 3 Important
Example 4 Deleted for CBSE Board 2023 Exams
Example 5 Deleted for CBSE Board 2023 Exams
Example 6 Important Deleted for CBSE Board 2023 Exams
Example 7 Deleted for CBSE Board 2023 Exams
Example 8 Important
Example 9
Example 10 Important
Example 11
Example 12 Important
Example 13
Example 14 Important
Example 15 Important
Example 16
Example 17 Important
Example 18 Important
Example 19 Important Deleted for CBSE Board 2023 Exams
Example 20 Deleted for CBSE Board 2023 Exams
Example 21 Important
Example 22
Example 23
Example 24 Important
Chapter 9 Class 11 Sequences and Series
Serial order wise
- Ex 9.1
- Ex 9.2
- Ex 9.3
- Ex 9.4
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Examples
- Miscellaneous
Transcript
Example 2 What is the 20th term of the sequence defined by an = (n 1) (2 n) (3 + n) ? We need to find 20th term i.e. a20 Let an = (n 1) (2 n) (3 + n) putting n = 20 in (1) a20 = (20 1) (2 20) (3 + 20) = (19) ( 18) (23) = 7866. Hence the 20th term is -7866
