6. Prove that for all natural numbers n, 2n +n <3".

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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It is only when we work on a proof and, in the midst e
that if we had another result things would work nicel
not know in advance of proving a statement that a lem
In this last problem it is important to note that
Chapte
68
Homework 2.9:
1. Prove that for all integers n2 6, 2n+2 < n!
2. Prove that for all integersn2 2, 2" > 1+n.
3. Prove that for every integer n, where n> 3, n2 > 2n.
4. Prove that for all integersn> 5, 2" > n². Hint: You
problem 3 above as a lemma for your proof of this pr
5. Prove that for all natural numbers n > 5, 5n +1 < 2"
6. Prove that for all natural numbers n, 2" +n < 3".
7. Prove that for all integers n, with n 2 2, n³ > 2n +1
8. Prove that for all natural numbers n > 5, (n + 1)! >=
9. Prove that for all integers n > 6, n! > n³. Hint: First
lemma: If n E Z,n > 6 then n³ > (n + 1)² and
proof.
a
and write a lemma
Transcribed Image Text:It is only when we work on a proof and, in the midst e that if we had another result things would work nicel not know in advance of proving a statement that a lem In this last problem it is important to note that Chapte 68 Homework 2.9: 1. Prove that for all integers n2 6, 2n+2 < n! 2. Prove that for all integersn2 2, 2" > 1+n. 3. Prove that for every integer n, where n> 3, n2 > 2n. 4. Prove that for all integersn> 5, 2" > n². Hint: You problem 3 above as a lemma for your proof of this pr 5. Prove that for all natural numbers n > 5, 5n +1 < 2" 6. Prove that for all natural numbers n, 2" +n < 3". 7. Prove that for all integers n, with n 2 2, n³ > 2n +1 8. Prove that for all natural numbers n > 5, (n + 1)! >= 9. Prove that for all integers n > 6, n! > n³. Hint: First lemma: If n E Z,n > 6 then n³ > (n + 1)² and proof. a and write a lemma
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