Consider the set Sn = {ann € N}, an = (−1)²+¹ (4₁). (i) Write the subsets S2 and S2-1 of Sn explicitly in set-theoretic form, such that Sn is the union of these subsets. (ii) Determine the supremum of S₁, with full justification if exists. (iii) Consider b = In [an], where In denote the natural logarithm of real numbers. Using Monotone Convergence Theorem, explain whether the sequence {b}) is convergent. (iv) Find lim b, in (iii) if exists. (v) Examine whether {b} in (iii) is a Cauchy sequence using definition (ɛ – 6). (vi) Can Bolzano-Weierstrass Theorem be applied to the sequence {b} in (iii)? In any case (yes or no), justify the reason with a supporting example.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Consider the set
Sn = {ann € N},
an = (-1)"+1
¹(+1).
(i) Write the subsets S2k and S2k-1 of S, explicitly in set-theoretic form, such that
Sn is the union of these subsets.
(ii) Determine the supremum of S₁, with full justification if exists.
(iii) Consider b₁ = In an], where In denote the natural logarithm of real numbers.
Using Monotone Convergence Theorem, explain whether the sequence {b} is
convergent.
(iv) Find lim b, in (iii) if exists.
(v) Examine whether {b} in (iii) is a Cauchy sequence using definition (-6).
(vi) Can Bolzano-Weierstrass Theorem be applied to the sequence {b} in (iii)? In
any case (yes or no), justify the reason with a supporting example.
Transcribed Image Text:Consider the set Sn = {ann € N}, an = (-1)"+1 ¹(+1). (i) Write the subsets S2k and S2k-1 of S, explicitly in set-theoretic form, such that Sn is the union of these subsets. (ii) Determine the supremum of S₁, with full justification if exists. (iii) Consider b₁ = In an], where In denote the natural logarithm of real numbers. Using Monotone Convergence Theorem, explain whether the sequence {b} is convergent. (iv) Find lim b, in (iii) if exists. (v) Examine whether {b} in (iii) is a Cauchy sequence using definition (-6). (vi) Can Bolzano-Weierstrass Theorem be applied to the sequence {b} in (iii)? In any case (yes or no), justify the reason with a supporting example.
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