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The radius of convergence of power series Sigma n=0 to infinity z^n/n is 1. True or False?
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The radius of convergence of power series Sigma n=0 to infinity z^n/n ...
Radius of Convergence of Power Series

False

Explanation:

Definition of Radius of Convergence:
The radius of convergence of a power series is the distance from the center of the series to the nearest point where the series converges.

Given Power Series:
The power series in question is Σ z^n/n, where n ranges from 0 to infinity.

Calculating the Radius of Convergence:
To find the radius of convergence, we can use the ratio test. Let's apply the ratio test to the given series:
r = lim(n→∞) |a(n+1)/a(n)|
= lim(n→∞) |z^(n+1)/(n+1)| / |z^n/n|
= lim(n→∞) |z/(n+1)|
= 0
Since the limit of the ratio is 0, the radius of convergence is infinite. This means that the power series Σ z^n/n converges for all values of z.
Therefore, the statement that the radius of convergence of the power series Σ z^n/n is 1 is False.
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The radius of convergence of power series Sigma n=0 to infinity z^n/n is 1. True or False?
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