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Mattofix
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Homework Statement
Find the radius of convergence of
(-1)^n(i^n)(n^2)(Z^n)/3^n
The Attempt at a Solution
i have got to lZl i (n+1)^2/3n^2
but am unsure how to complete it...
Last edited:
The radius of convergence is a mathematical concept used in power series to determine the set of values for which the series converges. It is denoted by R and can be calculated using the ratio test.
The radius of convergence is calculated using the ratio test, which compares the absolute value of the terms in a power series to determine if the series converges. The radius of convergence is the limit of this ratio as n approaches infinity.
If the radius of convergence is infinite, it means that the power series converges for all values of the variable. This is typically seen in exponential and trigonometric functions, where the series converges for all real numbers.
No, the radius of convergence cannot be negative. It represents a distance from the center of convergence, so it must be a positive value. However, it is possible for the radius of convergence to be 0, which means the series only converges at the center point.
The radius of convergence is important because it tells us for which values the power series is valid and accurate. It also helps us determine the convergence or divergence of a series, which is crucial in many mathematical and scientific applications.