Consider the sequence f(n) = 2 + 5n, where n is an integer > 1. (i) Evaluate the first six terms and sketch the graph of the seque (ii) Find the recursive prescription of the sequence.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.1: Infinite Sequences And Summation Notation
Problem 55E
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Question 4
(a) Consider the sequence f(n) = 2 + 5n, where n is an integer > 1.
(i) Evaluate the first six terms and sketch the graph of the sequence.
(ii) Find the recursive prescription of the sequence.
(b) (Using the method of trying a solution of the form f(n) = Kw", etc.,...) find the direct
prescription for the following recursively-prescribed sequence
f(n + 2) – 5f(n+ 1) + 6f(n) = 0, where n is an integer > 1, f(1) = 0, and f(2) = 6.
(c) Derive the following formulae
(i)
Σ
n(n + 1)
2
r=1
(ii)
n(n+ 1) (2n + 1)
6
r=1
(iii)
n(n+ 1)
2
II
II
Transcribed Image Text:Question 4 (a) Consider the sequence f(n) = 2 + 5n, where n is an integer > 1. (i) Evaluate the first six terms and sketch the graph of the sequence. (ii) Find the recursive prescription of the sequence. (b) (Using the method of trying a solution of the form f(n) = Kw", etc.,...) find the direct prescription for the following recursively-prescribed sequence f(n + 2) – 5f(n+ 1) + 6f(n) = 0, where n is an integer > 1, f(1) = 0, and f(2) = 6. (c) Derive the following formulae (i) Σ n(n + 1) 2 r=1 (ii) n(n+ 1) (2n + 1) 6 r=1 (iii) n(n+ 1) 2 II II
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