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Ex 8.1, 3 - 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
Ex9.1 , 3 Write the first five terms of the sequences whose nth term is an = 2n We need to find first five terms i.e. a1, a2, a3 , a4, a5 Given an = 2n Putting n = 1 in (1) a1 = 21 = 2 Putting n = 2 in (1) a2 = 22 a2 = 2 2 = 4 Putting n = 3 in (1) a3 = 23 a3 = 2 2 2 = 8 Putting n = 4 in (1) a4 = 24 a4 = 2 2 2 2 = 16 Putting n = 5 in (1) a5 = 25 a5 = 2 2 2 2 2 = 32 Hence first five terms are 2, 4, 8, 16, and 32.
