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-1^(i+1)/i!

Sum of series -1^(i+1)/i!



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The solution

You have entered [src]
  10          
____          
\   `         
 \      i + 1 
  \   -1      
  /   --------
 /       i!   
/___,         
i = 1         
$$\sum_{i=1}^{10} \frac{\left(-1\right) 1^{i + 1}}{i!}$$
Sum((-1^(i + 1))/factorial(i), (i, 1, 10))
The rate of convergence of the power series
The answer [src]
-6235301 
---------
 3628800 
$$- \frac{6235301}{3628800}$$
-6235301/3628800
Numerical answer [src]
-1.71828180114638447971781305115
-1.71828180114638447971781305115
The graph
Sum of series -1^(i+1)/i!

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