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factorial(2*n)/(2^n+3)

Sum of series factorial(2*n)/(2^n+3)



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The solution

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  oo        
____        
\   `       
 \    (2*n)!
  \   ------
  /    n    
 /    2  + 3
/___,       
n = 1       
$$\sum_{n=1}^{\infty} \frac{\left(2 n\right)!}{2^{n} + 3}$$
Sum(factorial(2*n)/(2^n + 3), (n, 1, oo))
The rate of convergence of the power series
The graph
Sum of series factorial(2*n)/(2^n+3)

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