Let d = 2, and dn ne N, dn = . dn-1 for all ne Z with n ≥ 2. Prove that for all n Let a₁ = 2, a2 2, a2 = 1, and for each natural number n > 2, let an = 2an-1-an-2. Prove that for all natural numbers n, an = 3-₁ Consider the sequence a₁ = 1, a2 = 5, and for n ≥ 3, an = 5an-1 – ban-1 Prove that for all natural numbers n, an = 3n - 2n

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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2 and 4
for k 3. For what specific initial value(s) would you need to show t
1. Suppose you have been asked to prove a statement about all integen
greater than or equal to 5. If you try to use induction and find that
need to be able to assume the statement is not only true for k, but:
als
of P
the
statement holds true?
does
for all n E Z with n 2. Prove that for a
aske
dn-1
2. Let di = 2, and dn
nEN, dn = .
tha
3. Let a = 2, a2 1, and for each natural number n > 2.
let a, = 2an-1-an-2. Prove that for all natural numbers n, a, = 3-.
the
4. Consider the sequence a1 =1, a2 = 5, and for n 2 3, an = 5an-1-6a
Prove that for all natural numbers n, an = 3" - 2".
5. Prove that any natural number can be written as 4x+5y for some integers
SUC
and
i.e. Vn E N, 3x, y E ZƏn = 4x + 5y.
y.
tha
COm
6. Let a1 =
= 2, a2 = 4, and for n 2 3, an =
5an-1-6an-2. Prove that for
every natural number n, an = 2".
7. Let a1 = a2 = 1, and for each natural number n > 2,
let an = an-1 + 3an-2. Prove that for each natural number n > 3,
an < 3n-2
8. Suppose that ho = 1, h1 = 2, h2
3, and for all integers n 2 3,
hn = hn-1+ hn-2+ hn-3. Prove that for all integers n 2 0, hn 3".
9. Let b1 = 3, b2 = 6 and for k > 3, where k is an integer, let bk = bk-2+0k-1
Prove that for all natural numbers n, bn is divisible by 3.
%3D
%3D
%3D
0. Let fi = 1, f2 = 1, and for n > 3, let fn = fn-1 + fn-2 Prove that lo
all n e N, f? + f2 + ... + f = fnfn+1
* bet 7 (2) = In r. Prove that for all n E N, f " (x) = C)- where
S" (z) is the nth derivative of f (x). Note that 0! = 1.
%3D
for all n E N, fn =
(4)"-(54)".
Transcribed Image Text:for k 3. For what specific initial value(s) would you need to show t 1. Suppose you have been asked to prove a statement about all integen greater than or equal to 5. If you try to use induction and find that need to be able to assume the statement is not only true for k, but: als of P the statement holds true? does for all n E Z with n 2. Prove that for a aske dn-1 2. Let di = 2, and dn nEN, dn = . tha 3. Let a = 2, a2 1, and for each natural number n > 2. let a, = 2an-1-an-2. Prove that for all natural numbers n, a, = 3-. the 4. Consider the sequence a1 =1, a2 = 5, and for n 2 3, an = 5an-1-6a Prove that for all natural numbers n, an = 3" - 2". 5. Prove that any natural number can be written as 4x+5y for some integers SUC and i.e. Vn E N, 3x, y E ZƏn = 4x + 5y. y. tha COm 6. Let a1 = = 2, a2 = 4, and for n 2 3, an = 5an-1-6an-2. Prove that for every natural number n, an = 2". 7. Let a1 = a2 = 1, and for each natural number n > 2, let an = an-1 + 3an-2. Prove that for each natural number n > 3, an < 3n-2 8. Suppose that ho = 1, h1 = 2, h2 3, and for all integers n 2 3, hn = hn-1+ hn-2+ hn-3. Prove that for all integers n 2 0, hn 3". 9. Let b1 = 3, b2 = 6 and for k > 3, where k is an integer, let bk = bk-2+0k-1 Prove that for all natural numbers n, bn is divisible by 3. %3D %3D %3D 0. Let fi = 1, f2 = 1, and for n > 3, let fn = fn-1 + fn-2 Prove that lo all n e N, f? + f2 + ... + f = fnfn+1 * bet 7 (2) = In r. Prove that for all n E N, f " (x) = C)- where S" (z) is the nth derivative of f (x). Note that 0! = 1. %3D for all n E N, fn = (4)"-(54)".
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