23. Prove that (xo, Yo), (x1, y1), and (x2, y2) lie on a line if and only if (х — Хо)02 — Уо) - (*з — Хо)(ут — Уо) %3D 0.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter2: The Integers
Section2.1: Postulates For The Integers (optional)
Problem 26E: Prove that the cancellation law for multiplication holds in Z. That is, if xy=xz and x0, then y=z.
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23. Prove that (xo, yo). (x1, y1), and (x2, y2) lie on a line if and only if
(x1 – xo)(y2 – Yo) – (x2 – xo)(y1 – Yo) = 0.
Transcribed Image Text:23. Prove that (xo, yo). (x1, y1), and (x2, y2) lie on a line if and only if (x1 – xo)(y2 – Yo) – (x2 – xo)(y1 – Yo) = 0.
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