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Which of the following is NOT true? * A.) If a is in R and a is not equal to 0, then a^2 > 0. B.) If m and n are elements in R with m + n = m, then n = 0. C.) If a < b and c < 0, then ca < cb. D.) If - m, n are elements of P, then - mn is also an element of P, where P is the set of positive real numbers.

Which of the following is NOT true? * A.) If a is in R and a is not equal to 0, then a^2 > 0. B.) If m and n are elements in R with m + n = m, then n = 0. C.) If a < b and c < 0, then ca < cb. D.) If - m, n are elements of P, then - mn is also an element of P, where P is the set of positive real numbers.

Elementary Geometry For College Students, 7e
Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter2: Parallel Lines
Section2.CT: Test
Problem 3CT: To prove a theorem of the form "If P, then Q" by the indirect method, the first line of the proof...
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Which of the following is NOT true? * A.) If a is in R and a is not equal to 0, then a^2 > 0. B.) If m and n are elements in R with m + n = m, then n = 0. C.) If a < b and c < 0, then ca < cb. D.) If - m, n are elements of P, then - mn is also an element of P, where P is the set of positive real numbers.
Transcribed Image Text:Which of the following is NOT true? * A.) If a is in R and a is not equal to 0, then a^2 > 0. B.) If m and n are elements in R with m + n = m, then n = 0. C.) If a < b and c < 0, then ca < cb. D.) If - m, n are elements of P, then - mn is also an element of P, where P is the set of positive real numbers.
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