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5*cos(sqrt(2*i))/25

Suma de la serie 5*cos(sqrt(2*i))/25



=

Solución

Ha introducido [src]
  25                
____                
\   `               
 \         /  _____\
  \   5*cos\\/ 2*i /
  /   --------------
 /          25      
/___,               
i = 1               
$$\sum_{i=1}^{25} \frac{5 \cos{\left(\sqrt{2 i} \right)}}{25}$$
Sum((5*cos(sqrt(2*i)))/25, (i, 1, 25))
Velocidad de la convergencia de la serie
Respuesta [src]
                              /  ___\      /  ___\      /  ____\      /  ____\      /  ____\      /  ____\      /  ____\      /  ____\      /  ____\      /  ____\      /  ____\      /    ___\      /    ___\      /    ___\      /    ___\      /    ___\      /    ____\      /    ____\      /    ___\      /    ___\      /    ___\      /    ___\
cos(2)   cos(4)   cos(6)   cos\\/ 2 /   cos\\/ 6 /   cos\\/ 10 /   cos\\/ 14 /   cos\\/ 22 /   cos\\/ 26 /   cos\\/ 30 /   cos\\/ 34 /   cos\\/ 38 /   cos\\/ 42 /   cos\\/ 46 /   cos\2*\/ 2 /   cos\2*\/ 3 /   cos\2*\/ 5 /   cos\2*\/ 6 /   cos\2*\/ 7 /   cos\2*\/ 10 /   cos\2*\/ 11 /   cos\3*\/ 2 /   cos\4*\/ 2 /   cos\4*\/ 3 /   cos\5*\/ 2 /
------ + ------ + ------ + ---------- + ---------- + ----------- + ----------- + ----------- + ----------- + ----------- + ----------- + ----------- + ----------- + ----------- + ------------ + ------------ + ------------ + ------------ + ------------ + ------------- + ------------- + ------------ + ------------ + ------------ + ------------
  5        5        5          5            5             5             5             5             5             5             5             5             5             5             5              5              5              5              5               5               5              5              5              5              5      
$$\frac{\cos{\left(\sqrt{10} \right)}}{5} + \frac{\cos{\left(2 \sqrt{2} \right)}}{5} + \frac{\cos{\left(2 \sqrt{3} \right)}}{5} + \frac{\cos{\left(\sqrt{14} \right)}}{5} + \frac{\cos{\left(\sqrt{6} \right)}}{5} + \frac{\cos{\left(4 \right)}}{5} + \frac{\cos{\left(3 \sqrt{2} \right)}}{5} + \frac{\cos{\left(2 \right)}}{5} + \frac{\cos{\left(2 \sqrt{5} \right)}}{5} + \frac{\cos{\left(\sqrt{22} \right)}}{5} + \frac{\cos{\left(\sqrt{2} \right)}}{5} + \frac{\cos{\left(2 \sqrt{6} \right)}}{5} + \frac{\cos{\left(\sqrt{26} \right)}}{5} + \frac{\cos{\left(2 \sqrt{7} \right)}}{5} + \frac{\cos{\left(\sqrt{30} \right)}}{5} + \frac{\cos{\left(5 \sqrt{2} \right)}}{5} + \frac{\cos{\left(4 \sqrt{3} \right)}}{5} + \frac{\cos{\left(4 \sqrt{2} \right)}}{5} + \frac{\cos{\left(\sqrt{46} \right)}}{5} + \frac{\cos{\left(\sqrt{34} \right)}}{5} + \frac{\cos{\left(2 \sqrt{11} \right)}}{5} + \frac{\cos{\left(6 \right)}}{5} + \frac{\cos{\left(\sqrt{42} \right)}}{5} + \frac{\cos{\left(\sqrt{38} \right)}}{5} + \frac{\cos{\left(2 \sqrt{10} \right)}}{5}$$
cos(2)/5 + cos(4)/5 + cos(6)/5 + cos(sqrt(2))/5 + cos(sqrt(6))/5 + cos(sqrt(10))/5 + cos(sqrt(14))/5 + cos(sqrt(22))/5 + cos(sqrt(26))/5 + cos(sqrt(30))/5 + cos(sqrt(34))/5 + cos(sqrt(38))/5 + cos(sqrt(42))/5 + cos(sqrt(46))/5 + cos(2*sqrt(2))/5 + cos(2*sqrt(3))/5 + cos(2*sqrt(5))/5 + cos(2*sqrt(6))/5 + cos(2*sqrt(7))/5 + cos(2*sqrt(10))/5 + cos(2*sqrt(11))/5 + cos(3*sqrt(2))/5 + cos(4*sqrt(2))/5 + cos(4*sqrt(3))/5 + cos(5*sqrt(2))/5
Respuesta numérica [src]
0.929062218742623088712083572051
0.929062218742623088712083572051
Gráfico
Suma de la serie 5*cos(sqrt(2*i))/25

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