4. Consider the statement Vx e R*, x > +. (a) Show that the statement is false. (h) LUSE quantifiers to write its negation.
4. Consider the statement Vx e R*, x > +. (a) Show that the statement is false. (h) LUSE quantifiers to write its negation.
Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter10: Inequalities
Section10.3: Solving Problems Involving Inequalities
Problem 28E
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Step 1
Let, the given statement is denoted by i.e.
Since contains the interval , let us consider an arbitrary
Now,
Since, , therefore implies . Thus, p is not true for all .
Hence, given statement p is false.
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