Let f: R → R be given by f (x) = (x − 1)². Prove that f(x) is neither one-to-one nor onto.
Let f: R → R be given by f (x) = (x − 1)². Prove that f(x) is neither one-to-one nor onto.
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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Step 1
Suppose x1 and x2 are real numbers such that f(x1) = f(x2). (We need to show ).
There are two possible values for : .
Since the value for can be two different values, f(x) is not one-to-one.
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