3. (i) Let {I1, I2, I3, · · ·} be a set of nested closed intervals, that is In+1 C In for all n. Prove that ... 8. n In # Ø i=1 (ii) Show that the above result need not hold if each In is allowed to be an open interval. (iii) Let {I1, I2, · , In} be a set of n intervals for some n > 3. Assume that they are pairwise intersecting, that is I; nI; # Ø for all i # j. Show using induction that n i=1 Does this contradict (ii) ? Justify your answer.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.1: Infinite Sequences And Summation Notation
Problem 74E
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Problem 3.(iii) please
3. (i) Let {I1, I2, I3, · ·} be a set of nested closed intervals, that is In+1 C In for all n. Prove that
8.
Ø 7 "IU
i=1
(ii) Show that the above result need not hold if each In is allowed to be an open interval.
(iii) Let {I1, I2, · . , In} be a set of n intervals for some n > 3. Assume that they are pairwise intersecting,
that is I; NI; + Ø for all i + j. Show using induction that
n
i=1
Does this contradict (ii) ? Justify your answer.
Transcribed Image Text:3. (i) Let {I1, I2, I3, · ·} be a set of nested closed intervals, that is In+1 C In for all n. Prove that 8. Ø 7 "IU i=1 (ii) Show that the above result need not hold if each In is allowed to be an open interval. (iii) Let {I1, I2, · . , In} be a set of n intervals for some n > 3. Assume that they are pairwise intersecting, that is I; NI; + Ø for all i + j. Show using induction that n i=1 Does this contradict (ii) ? Justify your answer.
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