3. Prove each of these divisibility statements by mathematical induction. (b) (a) 8|52n +7 for all n > 1. [Hint: 520k+1) + 7 = 5°(52k + 7) + (7 – 5? . 7).] (b) 3|2" + (–1)"+1 for all n > 1. (c) 21|4"+1 +52n-1 for all n > 1. (d) 24|2 · 7" +3·5" – 5 for all n > 1. (c)

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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3. Prove each of these divisibility statements by
(a) 8|54m +7 for all n > 1. [Hint: 52+1) +7
mathematical induction.
162
(b)
- 52(52k +7) + (7 – 5² · 7).]
(b) 3|2" + (-1)"+' for all n > 1.
(c) 21 4"+1 +52n-1 for all n > 1.
(d)24|2·7" +3·5" – 5 for all n > 1.
(c)
Transcribed Image Text:3. Prove each of these divisibility statements by (a) 8|54m +7 for all n > 1. [Hint: 52+1) +7 mathematical induction. 162 (b) - 52(52k +7) + (7 – 5² · 7).] (b) 3|2" + (-1)"+' for all n > 1. (c) 21 4"+1 +52n-1 for all n > 1. (d)24|2·7" +3·5" – 5 for all n > 1. (c)
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