Use mathematical induction to prove the statements.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.2: Exponents And Radicals
Problem 88E
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Use mathematical induction to prove the statements.

17. Prove that any amount of postage greater than or equal to 12 cents can be built using only 4-cent
and 5-cent stamps.
18. Prove that any amount of postage greater than or equal to 14 cents can be built using only 3-cent
and 8-cent stamps.
19. Prove that any amount of postage greater than or equal to 64 cents can be built using only 5-cent
and 17-cent stamps.

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