Suppose that Co, C, C2, ... is a sequence defined as follows: 2, c = 2, c2 = 6, Ck = 30 -3 for every integer k 2 3. Co %3D !3! Prove that c is even for each integer n20.
Suppose that Co, C, C2, ... is a sequence defined as follows: 2, c = 2, c2 = 6, Ck = 30 -3 for every integer k 2 3. Co %3D !3! Prove that c is even for each integer n20.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:Suppose that Co, C, C2, ... is a sequence defined as follows:
Co = 2, C = 2, C2 = 6,
Ck = 3c,-3 for every integer k 2 3.
Prove that co is even for each integer n 20.
Proof (by strong mathematical induction): Let the property P(n) be the following sentence.
C, is even.
We will show that P(n) is true for every integer n 2 0.
Show that P(0), P(1), and P(2) are true:
V even.
P(0), P(1), and P(2) are the statements "Co is even," "c, is even," and "c, is even," respectively. These statements are true because Select-
Show that for every integer k > 2, if P(i) is true for each integer i from 0 through k, then P(k + 1) is true:
Let k be any integer with k 2 2, and suppose c, is-Select--
v for every integer i with 0sisk. This is the Select-
We must show that c+1 is
By definition of Co, C1, C2 --
Select-
Ck +1=
Thus C is Select
Since k 2 2, we have that 0sk-2s k. So we can apply the inductive hypothesis to conclude that c is 3 times an Select-
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