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Suma de la serie (-1)^n*(x^(2n)/(2n)!)



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Solución

Ha introducido [src]
  10              
____              
\   `             
 \            2*n 
  \       n  x    
  /   (-1) *------
 /          (2*n)!
/___,             
n = 0             
$$\sum_{n=0}^{10} \left(-1\right)^{n} \frac{x^{2 n}}{\left(2 n\right)!}$$
Sum((-1)^n*(x^(2*n)/factorial(2*n)), (n, 0, 10))
Respuesta [src]
     2     6      10          14              18           4      8        12            16                  20        
    x     x      x           x               x            x      x        x             x                   x          
1 - -- - --- - ------- - ----------- - ---------------- + -- + ----- + --------- + -------------- + -------------------
    2    720   3628800   87178291200   6402373705728000   24   40320   479001600   20922789888000   2432902008176640000
$$\frac{x^{20}}{2432902008176640000} - \frac{x^{18}}{6402373705728000} + \frac{x^{16}}{20922789888000} - \frac{x^{14}}{87178291200} + \frac{x^{12}}{479001600} - \frac{x^{10}}{3628800} + \frac{x^{8}}{40320} - \frac{x^{6}}{720} + \frac{x^{4}}{24} - \frac{x^{2}}{2} + 1$$
1 - x^2/2 - x^6/720 - x^10/3628800 - x^14/87178291200 - x^18/6402373705728000 + x^4/24 + x^8/40320 + x^12/479001600 + x^16/20922789888000 + x^20/2432902008176640000

    Ejemplos de hallazgo de la suma de la serie