08-25-2009-lecture

08-25-2009-lecture - Real numbers • Show that there is a...

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Lecture 2 Review HW Absolute value |x - a| = distance from x to a. |x + a| = distance from x to (- a). Proof. x + a = x - (- a) |mx + b| = distance from mx to (- b) HW: Page 10: 15, 18, 21, 23, 24 Comment on absolute value function.
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Unformatted text preview: Real numbers • Show that there is a rational between any two real numbers. • Show that there is an irrational between any two real numbers. More real numbers than rationals?...
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