Fill in the blanks in the following proof, which shows that the sequence defined by the recurrence relation + 2* for each integer k z 2 - 1 atisfies the following formula. f- 2" +1- 3 for every integer n21 Proof (by mathematical induction): Suppose f,. f. fg. is a sequence that satisfies the recurrence relation f-f + 2" for each integer k z 2, with initial condition f,- 1. Ne need to show that when the sequence f,, f, fy... is defined in this recursive way, all the terms in the sequence also satisfy the exxplicit formula shown above. So let the property P(n) be the equation f- 2" +1 - 3. We will show that P(n) is true for every integer n2 1. Show that P(1) is true: The left-hand side of P(1) is 22 – 3 , which equals 1 . The right-hand side of P(1) is 1 . Since the left-hand and right-hand sides equal each other, P(1) is true. Show that for each integer k 2 1, if P(k) is true, then P(k + 1) is true: gt+1 - 3 , where f,, f, fa... is a sequence defined by the recurrence relation et k be any integer with k z 1, and suppose that P(k) is true. In other words, suppose that f,- f, -f + 2* for each integer k 2 2, with initial condition f, - 1. This is the inductive hypothesis.] Ne must show that P(k + 1) is true. In other words, we must show that f. 2*=2 – 3 Now the left-hand side of P(k + 1) is f* - f, +2* + 1 by definition of fi, fs, f., + 2* +1 by inductive hypothesis V - 3 by the laws of algebra and this is the right-hand side of P(k + 1). Hence the inductive step is complete. Thus, both the basis and the inductive steps have been proved, and so the proof by mathematical induction is complete.]
Fill in the blanks in the following proof, which shows that the sequence defined by the recurrence relation + 2* for each integer k z 2 - 1 atisfies the following formula. f- 2" +1- 3 for every integer n21 Proof (by mathematical induction): Suppose f,. f. fg. is a sequence that satisfies the recurrence relation f-f + 2" for each integer k z 2, with initial condition f,- 1. Ne need to show that when the sequence f,, f, fy... is defined in this recursive way, all the terms in the sequence also satisfy the exxplicit formula shown above. So let the property P(n) be the equation f- 2" +1 - 3. We will show that P(n) is true for every integer n2 1. Show that P(1) is true: The left-hand side of P(1) is 22 – 3 , which equals 1 . The right-hand side of P(1) is 1 . Since the left-hand and right-hand sides equal each other, P(1) is true. Show that for each integer k 2 1, if P(k) is true, then P(k + 1) is true: gt+1 - 3 , where f,, f, fa... is a sequence defined by the recurrence relation et k be any integer with k z 1, and suppose that P(k) is true. In other words, suppose that f,- f, -f + 2* for each integer k 2 2, with initial condition f, - 1. This is the inductive hypothesis.] Ne must show that P(k + 1) is true. In other words, we must show that f. 2*=2 – 3 Now the left-hand side of P(k + 1) is f* - f, +2* + 1 by definition of fi, fs, f., + 2* +1 by inductive hypothesis V - 3 by the laws of algebra and this is the right-hand side of P(k + 1). Hence the inductive step is complete. Thus, both the basis and the inductive steps have been proved, and so the proof by mathematical induction is complete.]
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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![Fill in the blanks in the following proof, which shows that the sequence defined by the recurrence relation
+ 2* for each integer k 2 2
= 1
satisfies the following formula.
f. = 2" +1- 3 for every integer n21
Proof (by mathematical induction):
Suppose f,, f,, f... is a sequence that satisfies the recurrence relation
f, = f, + 2* for each integer k 2 2, with initial condition f, = 1.
We need to show that when the sequence f,, f,, f,... is defined in this recursive way, all the terms in the sequence also satisfy the explicit formula shown above.
So let the property P(n) be the equation f, = 2" +1- 3. We will show that P(n) is true for every integer nz 1.
Show that P(1) is true:
The left-hand side of P(1) is 22 – 3
which equals 1
The right-hand side of P(1) is 1
v . Since the left-hand and right-hand sides equal each other, P(1) is true.
Show that for each integer k21, if P(k) is true, then P(k + 1) is true:
Let k be any integer with k z 1, and suppose that P(k) is true. In other words, suppose that f, = 2*+1- 3
where f,, f2, f3,... is a sequence defined by the recurrence relation
f = f -1
+ 2* for each integer k z 2, with initial condition f, = 1.
[This is the inductive hypothesis.]
We must show that P(k + 1) is true. In other words, we must show that f1
gt+2 - 3
. Now the left-hand side of P(k + 1) is
fe+1 = f, +2* + 1
by definition of f, f, f
+ 2k + 1
by inductive hypothesis
by the laws of algebra
and this is the right-hand side of P(k + 1). Hence the inductive step is complete.
[Thus, both the basis and the inductive steps have been proved, and so the proof by mathematical induction is complete.]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb2b801ef-259c-473d-9009-1e1b33ddc8b5%2Fe9070604-3b27-45de-9c4f-c31863b8b822%2F4szbey_processed.png&w=3840&q=75)
Transcribed Image Text:Fill in the blanks in the following proof, which shows that the sequence defined by the recurrence relation
+ 2* for each integer k 2 2
= 1
satisfies the following formula.
f. = 2" +1- 3 for every integer n21
Proof (by mathematical induction):
Suppose f,, f,, f... is a sequence that satisfies the recurrence relation
f, = f, + 2* for each integer k 2 2, with initial condition f, = 1.
We need to show that when the sequence f,, f,, f,... is defined in this recursive way, all the terms in the sequence also satisfy the explicit formula shown above.
So let the property P(n) be the equation f, = 2" +1- 3. We will show that P(n) is true for every integer nz 1.
Show that P(1) is true:
The left-hand side of P(1) is 22 – 3
which equals 1
The right-hand side of P(1) is 1
v . Since the left-hand and right-hand sides equal each other, P(1) is true.
Show that for each integer k21, if P(k) is true, then P(k + 1) is true:
Let k be any integer with k z 1, and suppose that P(k) is true. In other words, suppose that f, = 2*+1- 3
where f,, f2, f3,... is a sequence defined by the recurrence relation
f = f -1
+ 2* for each integer k z 2, with initial condition f, = 1.
[This is the inductive hypothesis.]
We must show that P(k + 1) is true. In other words, we must show that f1
gt+2 - 3
. Now the left-hand side of P(k + 1) is
fe+1 = f, +2* + 1
by definition of f, f, f
+ 2k + 1
by inductive hypothesis
by the laws of algebra
and this is the right-hand side of P(k + 1). Hence the inductive step is complete.
[Thus, both the basis and the inductive steps have been proved, and so the proof by mathematical induction is complete.]
Transcribed Image Text:If a bank pays interest at a rate of i compounded m times a year, then the amount of money P, at the end of k time periods (where one time period = 1/mth of a year)
satisfies the recurrence relation P, =
k
1 +
Pk - 1
with initial condition P.
= the initial amount deposited. Find an explicit formula for P,
n'
m
The given recurrence relation defines ---Select---
v with constant ---Select---
which is
. Therefore, Pn
for every
%3D
integer n 2 0.
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