et n > 3 and 2
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter2: Equations And Inequalities
Section2.6: Inequalities
Problem 80E
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Question

Transcribed Image Text:Let n > 3 and 2 < k < n – 1. Prove the inequality
(;) - (*- **) > (;)
')<(3)
k
n – k +
+
in two ways: (a) algebraic proof, and (b) combinatorial proof
Hint for (b): show that the left side counts only some of the things counted by the right side.
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