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Ex 8.1, 2 - Chapter 8 Class 11 Sequences and Series
Last updated at Dec. 16, 2024 by Teachoo
Chapter 8 Class 11 Sequences and Series
Concept wise
-
Finding Sequences
- Arithmetic Progression (AP): Formulae based
- Arithmetic Progression (AP): Statement
- Arithmetic Progression (AP): Calculation based/Proofs
- Inserting AP between two numbers
- Arithmetic Mean (AM)
- Geometric Progression(GP): Formulae based
- Geometric Progression(GP): Statement
- Geometric Progression(GP): Calculation based/Proofs
- Inserting GP between two numbers
- Geometric Mean (GM)
- AM and GM (Arithmetic Mean And Geometric mean)
- AP and GP mix questions
- Finding sum from series
- Finding sum from nth number
Transcript
Ex 8.1 , 2 Write the first five terms of the sequences whose nth term is an = n/(n + 1) We need to find first five terms i.e. a1, a2, a3 , a4, a5 Given an = n/(n + 1) Putting n = 1 in (1) a1 = 1/(1+1) a1 = 1/2 Putting n = 2 in (1) "a2 = " 2/(2+1) " " a2 "= " 2/3 Putting n = 3 in (1) "a3 = " 3/(3+1) " " a3 "= " 3/4 Putting n = 4 in (1) "a4 = " 4/(4+1) " " a4 "= " 4/5 Putting n = 5 in (1) "a5 = " 5/(5+1) a5 "= " 5/6 Hence first five terms are 1/2 , 2/3 ," " 3/4 , 4/5 and 5/6
