Bit-strings Let B, = {0, 1}®n denote the set of bit-strings of length n. Then |Bn] = 2". Let 1

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
icon
Related questions
Question

Bit strings help required

Bit-strings
Let B, = {0, 1}®n denote the set of bit-strings of length n. Then |Bn] = 2". Let 1<t<n be some given
integer.
1. Let 1<j<n. We now construct a subset A; of Bn and count its size. Let A; be the set of bit-strings in
B, that simultancously satisfy all of the following three constraints: (i) bit j is 1, (ii) bits j +1 through
n are all 0, and (iii) among bits 1 through j – 1 there are exactly t – 1 bits that are 1. What is |A;|?
Justify your answer and show your calculations. (Hint: The answer is a binomial.)
2. The following binomial identity is truc:
() -EC )
b - 1
а — 1
b=1
Use your answer from the previous question to give a combinatorial proof of the identity. You are required
to use your answer to the previous question as a main part of your proof, and you are required to give a
combinatorial proof (as e.g. discussed in L13).
Transcribed Image Text:Bit-strings Let B, = {0, 1}®n denote the set of bit-strings of length n. Then |Bn] = 2". Let 1<t<n be some given integer. 1. Let 1<j<n. We now construct a subset A; of Bn and count its size. Let A; be the set of bit-strings in B, that simultancously satisfy all of the following three constraints: (i) bit j is 1, (ii) bits j +1 through n are all 0, and (iii) among bits 1 through j – 1 there are exactly t – 1 bits that are 1. What is |A;|? Justify your answer and show your calculations. (Hint: The answer is a binomial.) 2. The following binomial identity is truc: () -EC ) b - 1 а — 1 b=1 Use your answer from the previous question to give a combinatorial proof of the identity. You are required to use your answer to the previous question as a main part of your proof, and you are required to give a combinatorial proof (as e.g. discussed in L13).
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Similar questions
Recommended textbooks for you
Algebra and Trigonometry (6th Edition)
Algebra and Trigonometry (6th Edition)
Algebra
ISBN:
9780134463216
Author:
Robert F. Blitzer
Publisher:
PEARSON
Contemporary Abstract Algebra
Contemporary Abstract Algebra
Algebra
ISBN:
9781305657960
Author:
Joseph Gallian
Publisher:
Cengage Learning
Linear Algebra: A Modern Introduction
Linear Algebra: A Modern Introduction
Algebra
ISBN:
9781285463247
Author:
David Poole
Publisher:
Cengage Learning
Algebra And Trigonometry (11th Edition)
Algebra And Trigonometry (11th Edition)
Algebra
ISBN:
9780135163078
Author:
Michael Sullivan
Publisher:
PEARSON
Introduction to Linear Algebra, Fifth Edition
Introduction to Linear Algebra, Fifth Edition
Algebra
ISBN:
9780980232776
Author:
Gilbert Strang
Publisher:
Wellesley-Cambridge Press
College Algebra (Collegiate Math)
College Algebra (Collegiate Math)
Algebra
ISBN:
9780077836344
Author:
Julie Miller, Donna Gerken
Publisher:
McGraw-Hill Education