Consider two functions f(x) = 5x + 8 and g(x) = (x-8)/5 Suppose I want the output of my function f to be a number A. Describe how to choose an input x so that the output of f(x) is the desired number

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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  1. Consider two functions f(x) = 5x + 8 and g(x) = (x-8)/5

Suppose I want the output of my function f to be a number A. Describe how to choose an input x so that the output of f(x) is the desired number A.

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The input x should be choosen by considering certain information about  f(x) as when number should be multiplied with 5 and after addition with 8 it should give positive results. 

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