1) For a sytem of 10-digit unsigned base 2 numbers, how many numbers can be represented?

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Chapter1: Introduction
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1) For a sytem of 10-digit unsigned base 2 numbers, how many numbers can be represented?

2) For a (n-1) digit 2's complement binary number (n>2), what is the number of negative integers?

3) For a 10 digit 2's complement number, what is the difference between the most positive number and the most negative number? 

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