R1: Pick a natural number N > 1. For k2 0, define Ar = (az» N + azi N+1) + (az» N+2 + az+ N+3) + · · · + (azs+1N-2 + az+1N=1) Write a, in terms of Ag, and show that one series converges if, and only n21 if, the other series converges. k20 R2: Suppose M = max{Lo, L1} is finite. Show that we can choose a natural number N and a real number r> M such that Ak+1 5 2rAg for all k > 0. R3: Show that if M = max{Lo, L1} < ; 1 2 then the series an converges absolutely. R4: Let m = min{Lo, L1}. Show that we can choose a natural number N and a real number r < m such that Ag+1 2 2r Ag for all k > 0. 1 R5: Show that if m = min{Lo, L1} > then the series > an diverges. 2 n21

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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R1: Pick a natural number N > 1. For k > 0, define
Ar = (azk N + azk N+1) + (a2*N+2 + azk N+3) + · .. + (a2k+1N_2 + agk+1N–1)
Write a, in terms of Ag, and show that one series converges if, and only
n21
k20
if, the other series converges.
R2: Suppose M = max{Lo, L1} is finite. Show that we can choose a natural number
N and a real number r > M such that Ak+1 < 2rAr for all k > 0.
1
R3: Show that if M = max{Lo, L1} <; then the series an converges absolutely.
n21
R4: Let m = min{Lo, L1}. Show that we can choose a natural number N and a real
number r < m such that A+1 2 2r A for all k > 0.
1
R5: Show that if m = min{Lo, L1} >
then the series ) an diverges.
2
Σ
n21
Transcribed Image Text:R1: Pick a natural number N > 1. For k > 0, define Ar = (azk N + azk N+1) + (a2*N+2 + azk N+3) + · .. + (a2k+1N_2 + agk+1N–1) Write a, in terms of Ag, and show that one series converges if, and only n21 k20 if, the other series converges. R2: Suppose M = max{Lo, L1} is finite. Show that we can choose a natural number N and a real number r > M such that Ak+1 < 2rAr for all k > 0. 1 R3: Show that if M = max{Lo, L1} <; then the series an converges absolutely. n21 R4: Let m = min{Lo, L1}. Show that we can choose a natural number N and a real number r < m such that A+1 2 2r A for all k > 0. 1 R5: Show that if m = min{Lo, L1} > then the series ) an diverges. 2 Σ n21
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