The ISBN of a book is a unique 13-digit code', also known as ISBN-13, that encodes information about the publisher, registrant, place of publication, and so on. If the ISBN-13 of a book is Y1Y2Y3 •· * · Y13, then it must satisfy the following congruence: y1 + 3y2 + y3 + 3y4 + y5 + 3y6 + y7 + 3ys + yo + 3y10 + y11 + 3y12 + Y13 = 0 (mod 10). (a) Find a book at home and take a picture of it showing the 13-digit ISBN. Then show that its ISBN satisfies this congruence. (b) Suppose vou have another book whose ISBN is partially erased so that vou can't read the fifth digit

The ISBN of a book is a unique 13-digit code', also known as ISBN-13, that encodes information about the publisher, registrant, place of publication, and so on. If the ISBN-13 of a book is Y1Y2Y3 •· * · Y13, then it must satisfy the following congruence: y1 + 3y2 + y3 + 3y4 + y5 + 3y6 + y7 + 3ys + yo + 3y10 + y11 + 3y12 + Y13 = 0 (mod 10). (a) Find a book at home and take a picture of it showing the 13-digit ISBN. Then show that its ISBN satisfies this congruence. (b) Suppose vou have another book whose ISBN is partially erased so that vou can't read the fifth digit

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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