Introductory Combinatorics
Introductory Combinatorics
5th Edition
ISBN: 9780136020400
Author: Richard A. Brualdi
Publisher: Prentice Hall
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Chapter 7, Problem 1E

(a)

To determine

To prove: The f1+f3+...+f2n1 using the mathematical induction and the Fibonacci recurrence relation.

(a)

Expert Solution
Check Mark

Explanation of Solution

Using the mathematical induction and the Fibonacci recurrence.

The sequence of numbers f0,f1,f2,...,fn,... satisfying the recurrence relation and initial conditions are fn=fn1+fn2 where, n2 is called the Fibonacci sequence, and the terms of the sequence are called Fibonacci numbers. The recurrence relation in (7.4) is also called the Fibonacci recurrence.

From our calculations, the first few terms of the Fibonacci sequence are

0, 1, 1, 2, 3, 5, 8, 13, 21, 34,....

Using these values to calculate the next steps which is given in table 1.

nk=1nf2k1
00
11
23
38
421
555
6144
7377
nf2n

Table 1

Table 1 shows the recurrence relation for the given f1+f3+...+f2n1.

Where, n is the numbers and k=1nf2k1 is the mathematical induction series.

(b)

To determine

To prove: The f0+f2+...+f2n using the mathematical induction and the Fibonacci recurrence.

(b)

Expert Solution
Check Mark

Explanation of Solution

Using the mathematical induction and the Fibonacci recurrence.

The sequence of numbers f0,f1,f2,...,fn,... satisfying the recurrence relation and initial conditions are fn=fn1+fn2 where, n2 is called the Fibonacci sequence, and the terms of the sequence are called Fibonacci numbers. The recurrence relation in (7.4) is also called the Fibonacci recurrence.

From our calculations, the first few terms of the Fibonacci sequence are

0, 1, 1, 2, 3, 5, 8, 13, 21, 34,....

Using these values to calculate the next steps which is given in table 2.

nk=0nf2k
00
11
24
312
433
588
6232
7609
nf2n+11

Table 2

Table 2 shows the recurrence relation for the given f0+f2+...+f2n.

Where, n is the numbers and k=0nf2k is the mathematical induction series.

(c)

To determine

To prove: The f0f1+f2...+(1)nfn using the mathematical induction and the Fibonacci recurrence.

(c)

Expert Solution
Check Mark

Explanation of Solution

Using the mathematical induction and the Fibonacci recurrence.

The sequence of numbers f0,f1,f2,...,fn,... satisfying the recurrence relation and initial conditions are fn=fn1+fn2 where, n2 is called the Fibonacci sequence, and the terms of the sequence are called Fibonacci numbers.

The recurrence relation in (7.4) is also called the Fibonacci recurrence.

From our calculations, the first few terms of the Fibonacci sequence are

0, 1, 1, 2, 3, 5, 8, 13, 21, 34,....

Using these values to calculate the next steps which is given in table 3.

nk=0n(1)nfk
00
11
20
32
41
54
64
79
n1+(1)nfn1

Table 3

Table 3 shows the recurrence relation for the given f0f1+f2...+(1)nfn.

Where, n is the numbers and k=0n(1)nfk is the mathematical induction series.

(d)

To determine

To prove: f02+f12+...+fn2 by using the mathematical induction and the Fibonacci recurrence.

(d)

Expert Solution
Check Mark

Explanation of Solution

Using the mathematical induction and the Fibonacci recurrence.

The sequence of numbers f0,f1,f2,...,fn,... satisfying the recurrence relation and initial conditions are fn=fn1+fn2 where, n2 is called the Fibonacci sequence, and the terms of the sequence are called Fibonacci numbers. The recurrence relation in (7.4) is also called the Fibonacci recurrence.

From our calculations, the first few terms of the Fibonacci sequence are

0, 1, 1, 2, 3, 5, 8, 13, 21, 34,....

Using these values to calculate the next steps which is given in table 4.

nk=0nfk2
00
1 
22
36=2×3
415=3×5
540=5×8
6104=13×21
7273=13×21
nfnfn+1

Table 4

Table 4 shows the recurrence relation for the given f02+f12+...+fn2.

Where, n is the numbers and k=0nfk2 is the mathematical induction series.

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Chapter 7 Solutions

Introductory Combinatorics

Ch. 7 - Prob. 11ECh. 7 - Prob. 12ECh. 7 - 13. Determine the generating function for each of...Ch. 7 - 14. Let S be the multiset {∞ · e1, ∞ · e2, ∞ · e3,...Ch. 7 - 15. Determine the generating function for the...Ch. 7 - 16. Formulate a combinatorial problem for which...Ch. 7 - 17. Determine the generating function for the...Ch. 7 - 18. Determine the generating function for the...Ch. 7 - 19. Let h0, h1, h2, …, hn, … be the sequence...Ch. 7 - Prob. 20ECh. 7 - 21. * Let hn denote the number of regions into...Ch. 7 - 22. Determine the exponential generating function...Ch. 7 - 23. Let α be a real number. Let the sequence h0,...Ch. 7 - 24. Let S be the multiset {∞ · e1, ∞ · e2, · , ∞ ·...Ch. 7 - 25. Let hn denote the number of ways to color the...Ch. 7 - Determine the number of ways to color the squares...Ch. 7 - Determine the number of n-digit numbers with all...Ch. 7 - Determine the number of n-digit numbers with all...Ch. 7 - We have used exponential generating functions to...Ch. 7 - Prob. 30ECh. 7 - Solve the recurrence relation hn = 4hn−2, (n ≥ 2)...Ch. 7 - Prob. 32ECh. 7 - Solve the recurrence relation hn = hn−1 + 9hn−2 −...Ch. 7 - Solve the recurrence relation hn = 8hn−1 − 16hn−2,...Ch. 7 - Solve the recurrence relation hn = 3hn − 2 − 2hn −...Ch. 7 - Prob. 36ECh. 7 - Determine a recurrence relation for the number an...Ch. 7 - Prob. 38ECh. 7 - Let hn denote the number of ways to perfectly...Ch. 7 - Let an equal the number of ternary strings of...Ch. 7 - * Let 2n equally spaced points be chosen on a...Ch. 7 - Solve the nonhomogeneous recurrence relation Ch. 7 - Solve the nonhomogeneous recurrence relation hn =...Ch. 7 - Solve the nonhomogeneous recurrence relation Ch. 7 - Prob. 45ECh. 7 - Solve the nonhomogeneous recurrence relation Ch. 7 - Solve the nonhomogeneous recurrence relation Ch. 7 - Solve the following recurrence relations by using...Ch. 7 - (q-binomial theorem) Prove that where is the...Ch. 7 - Call a subset S of the integers {1, 2, …, n}...Ch. 7 - Solve the recurrence relation from Section 7.6...Ch. 7 - Prob. 52ECh. 7 - Suppose you deposit $500 in a bank account that...
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