Find the Radius of Convergence and the Interval of Convergence $$\sum _ { n = 0 } ^ { \infty } \frac { ( 7 x ) ^ { n } } { n ! }$$

question 40

Multiple Choice

Find the radius of convergence and the interval of convergence of the power series.
$$\sum _ { n = 0 } ^ { \infty } \frac { ( 7 x ) ^ { n } } { n ! }$$

• A) \(R = 7 , I = ( - 7,7 )\)
• B) \(R = 0 , I = \{ 0 \}\)
• C) \(R = 7 , I = [ - 7,7 ]\)
• D) \(R = \infty , I = ( - \infty , \infty )\)

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