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Introduction to Computer Systems Chapter 1

# Introduction to Computer Systems Chapter 1 - Appendix F...

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Appendix F Selected Solutions F.1 Chapter 1 Solutions 1.1 Every computer can do the same thing as every other computer. A smaller or slower computer will just take longer. 1.3 It is hard to increase the accuracy of analog machines. 1.5 (a) inputs to first (x) box are a and x output of first (x) box is ax inputs to second (+) box are ax and b output of second (+) box is ax + b (b) inputs to first (+) box are w and x output of first (+) box is w + x inputs to second (+) box are y and z output of second (+) box is y + z inputs to third (+) box are ( w + x ) and ( y + z ) output of third (+) box is w + x + y + z inputs to fourth (x) box are ( w + x + y + z ) and .25 output of fourth (x) box is 0 . 25( w + x + y + z ) , which is the average (c) The key is to factor a 2 + 2 ab + b 2 = ( a + b ) 2 inputs to first (+) box are a and b output of first (+) box is a + b inputs to second (x) box are ( a + b ) and ( a + b ) output of second (x) box is ( a + b ) 2 = a 2 + 2 ab + b 2 1.7 If the taxi driver is honorable, he/she asks you whether time or money is more important to you, and then gets you to the airport as quickly or as cheaply as possible.

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