1. (a) Consider the set S {n(-1)" : n e N}. Verify the existence or otherwise of Min(S) and Max(S). nex}. 2n :ne N 1 3n +1 (b) Let B = 1 i. Prove that inf B 2 ii. Show sup B = 3 (c) If r, y ER such that r> 0 and y> 0. Using the fact that,rE R, a2 2 0, prove each of the following. 1 xyS(x+y). i. Vry 2 1 ii. ry <; (x² + y*).
1. (a) Consider the set S {n(-1)" : n e N}. Verify the existence or otherwise of Min(S) and Max(S). nex}. 2n :ne N 1 3n +1 (b) Let B = 1 i. Prove that inf B 2 ii. Show sup B = 3 (c) If r, y ER such that r> 0 and y> 0. Using the fact that,rE R, a2 2 0, prove each of the following. 1 xyS(x+y). i. Vry 2 1 ii. ry <; (x² + y*).
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:1. (a) Consider the set S = {n(-1)" : n e N}. Verify the existence or otherwise of
Min(S) and Max(S).
2n
(b) Let B =
{ ân + 1 * m€N
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i. Prove that inf B
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ii. Show sup B
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(c) If x, y ER such that r> 0 and y > 0. Using the fact that , Vr E R, r? > 0,
prove each of the following.
1
i. Vry <; (x+ y).
1
ii. xy < (x2 + y²).
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