Use an appropriate comparison test to determine the
convergence/divergence of the following series:
a.)∑ n= (1)/(√n−1) (Upper limit of the sigma is ∞ and the lower
limit of the sigma is n=2)
b.) ∑ n=n(n+1)/(n^2+1) (n-1) (Upper limit of sigma is ∞ and the
lower limit of sigma is n=2)
c.) ∑ n= cos^2(n)/ (n^3/2) (Upper limit of sigma is ∞ and the
lower limit of sigma is n=1)
d.) ∑ 5^n/(√n4^n) (Upper limit of sigma is ∞ and the...
Tests for divergence of convergence
4)
a) Use the ratio test to deteremine whether the series converges
or diverges
infinite sum (4^n)/(n!)
n = 1
b) Use the root test to determine whether the series converges
or diverges
infinite sum ((2n + 1)/7n + 4) ^ 2n
n = 1
stuck on this hw question !
find the radius of convergence and interval of convergence of
the series ∑ n=1 ~ ∞ (3^n)((x+4)^n) / √n
Please solve this problem with detailed process of solving.
I can't understand why the answer is [-13/3, -11/3)
I thought that the answer was (-13/3, -11/3].
Can you explain why that is the answer?
1. Test the series below for convergence using the Root
Test.
∞∑n=1 (2n/7n+5)^n
The limit of the root test simplifies to lim n→∞ |f(n)| where
f(n)=
The limit is:
Based on this, the series
Diverges
Converges
2. Multiple choice question. We want to use the
Alternating Series Test to determine if the series:
∞∑k=4 (−1)^k+2 k^2/√k5+3
converges or diverges.
We can conclude that:
The Alternating Series Test does not apply because the terms of
the series do not alternate.
The...
For each of the following numerical series, study its
convergence or its divergence, by specifying the criterion used
Let? (?) = ∫cos (?3) dx
(a) (3 points) ExpressF (x) as a series of powers.
(b) (2 points) Limiting to the first four non-zero terms of the
previous series, estimate the value of ? = ∫√? cos (?3) ??. −√?
(c) (1 point) Evaluate the error made by this approximation.
1) Find the radius of convergence and interval
of convergence of the given series Σ x^2n/n!
2) Find the power series representation of
f(x)=(x-1)/(x+2) first then find its interval of convergence.
#13) Find the radius and interval of convergence of the power
series (Sigma∞ n=1) (−1)^n(x − 1)^n/n4^n by responding to the
following sequence of questions.
(a) Compute the limit L = lim n→∞ |an+1|/|an| .
(b) Given that the power series absolutely converges for L <
1 by the Ratio Test, compute the radius of convergence, where the
radius of convergence is the real number R such that the power
series converges for all |x| < R.
(c) Test whether...