(3-3) Let us study the following series E-0 (n+1)(4+1)(x + 1)²,

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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Please show me the procedure/calculations (especially for the root test and where it converges) for this question. The results are already written but I would like to understand how to find these results.

If not specified otherwise, fill in the blanks with integers (pos-
sibly 0 or negative). A fraction should be reduced (for ex-
ample, is accepted but not ), and if it is negative and the
answer boxes (such as 4) have ambiguity, the negative sign
b
a
is accepted
should be put on the numerator (for example
but is not). log x = loger, not log10 .
Let us study the following series E-0 (n+1)(4+1)
with various x.
5(x + 1)²,
This series makes sense also for x C. For x = i√3, calculate
(3-3)²
a
с
5(x + 1)2n
n=0 (n+1)(4+1)
b
d
a
-62b 17 ✔C-96 ✓d:
17 ✓
In order to use the root test for a € R, we put an =
1)2. Complete the formula.
the partial sum -
lim (a)
n-x
e
ga+h
j
for < x <
k
j: -5 ✓k: 3✔1:-1 ✔ m 3 ✔
For the case x = -1, the series
converges absolutely. ✔
converges but not absolutely.
=
e: 9f4g: 1 ✓h:1✔: 2 ✓
Therefore, by the root test, the series converges absolutely
1
m
• diverges.
For the case r=-3, the series
• converges absolutely.
converges but not absolutely.
• diverges. ✔
√3i.
(3-3)²
(n+1)(4+1)(x+
Transcribed Image Text:If not specified otherwise, fill in the blanks with integers (pos- sibly 0 or negative). A fraction should be reduced (for ex- ample, is accepted but not ), and if it is negative and the answer boxes (such as 4) have ambiguity, the negative sign b a is accepted should be put on the numerator (for example but is not). log x = loger, not log10 . Let us study the following series E-0 (n+1)(4+1) with various x. 5(x + 1)², This series makes sense also for x C. For x = i√3, calculate (3-3)² a с 5(x + 1)2n n=0 (n+1)(4+1) b d a -62b 17 ✔C-96 ✓d: 17 ✓ In order to use the root test for a € R, we put an = 1)2. Complete the formula. the partial sum - lim (a) n-x e ga+h j for < x < k j: -5 ✓k: 3✔1:-1 ✔ m 3 ✔ For the case x = -1, the series converges absolutely. ✔ converges but not absolutely. = e: 9f4g: 1 ✓h:1✔: 2 ✓ Therefore, by the root test, the series converges absolutely 1 m • diverges. For the case r=-3, the series • converges absolutely. converges but not absolutely. • diverges. ✔ √3i. (3-3)² (n+1)(4+1)(x+
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