1. Prove that if Σ,a; converges absolutely, then Σα absolutely. converges

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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Question
Real Analysis II: Kindly solve problem in photo 1 with notes from photo 2
{a}
09. AST. I fant in
numbers and
Defi Eaj
ex. 2.0
Conv. by
A-S-T
ex.
|a₁ ≤
(
8 W.
&a
fact
a
lim an o
is abs Conv.
abs. Conv..
because
J+1
Study 3/5 = 1/2 1/²
"1
is
E
B₁Aj
every Eaj
decreasing seg of positive
then & (-1)+
NOT
Thim: (Absolute Convergence Test)
If Assume
If Eaj Conv. abs, then 2(a) Conv.
Eaj
Conv. abs.
[Since |aj| = |aj| t; = 1, ...
j
we Ɛaj
get Eaj Conv.
80
if 2 lail Conv...
yes
abs. Conv.
an Converges-
Conv. (P-Sehes
p=2
X EA CON.
(Harmonic, Siv)
Problem
Bj
Elajh Conv.
aux
Coution the Converse is false
Def if Eaj Conv. but does not
Conv. abs then Eag Convergo Condition
22
either diverges Conv. abs,
от
Conv. Conditi
EGI
A
= 1 = 1/2 + 1/3 - 1/14 + 1/5 - 1/6 + 1/ 7- / 8 + 1/ 7- / 10 + 1/11 - 1/12 + 1/3 - 1/12/
#½-1⁄2-1⁄4-16-18-1/10 - 1/12 - 1/14
Transcribed Image Text:{a} 09. AST. I fant in numbers and Defi Eaj ex. 2.0 Conv. by A-S-T ex. |a₁ ≤ ( 8 W. &a fact a lim an o is abs Conv. abs. Conv.. because J+1 Study 3/5 = 1/2 1/² "1 is E B₁Aj every Eaj decreasing seg of positive then & (-1)+ NOT Thim: (Absolute Convergence Test) If Assume If Eaj Conv. abs, then 2(a) Conv. Eaj Conv. abs. [Since |aj| = |aj| t; = 1, ... j we Ɛaj get Eaj Conv. 80 if 2 lail Conv... yes abs. Conv. an Converges- Conv. (P-Sehes p=2 X EA CON. (Harmonic, Siv) Problem Bj Elajh Conv. aux Coution the Converse is false Def if Eaj Conv. but does not Conv. abs then Eag Convergo Condition 22 either diverges Conv. abs, от Conv. Conditi EGI A = 1 = 1/2 + 1/3 - 1/14 + 1/5 - 1/6 + 1/ 7- / 8 + 1/ 7- / 10 + 1/11 - 1/12 + 1/3 - 1/12/ #½-1⁄2-1⁄4-16-18-1/10 - 1/12 - 1/14
ing Series Test does not apply.
4. Prove that if
absolutely.
₁ a, converges absolutely, then a converges
1''
llu qugh that
Transcribed Image Text:ing Series Test does not apply. 4. Prove that if absolutely. ₁ a, converges absolutely, then a converges 1'' llu qugh that
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