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Engineering Mathematics Question on Convergence tests

The Radius of convergence of the power series f(z)=∑n=0∞zn2n+3f(z) = \sum ^{\infty }_{n=0} \frac{z^n}{ 2^n +3}

A

2

B

13\frac{1}3

C

32\frac{3}2

D

12\frac{1}2

Answer

2

Explanation

Solution

The correct option is (A):2 .