Mister Exam

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Sum of series:
(2*n-1)/2^n
(-1)^n
6/(9n^2+6n-8)
sin2x
Graphing y =:
sin2x
Derivative of:
sin2x
Integral of d{x}:
sin2x
Identical expressions
sin2x
sinus of 2x
Similar expressions
sin^2(x)/3^n
arcsin(2x)
sin^2(x)/(x^(1/3))
sin^2(xn)
cos(5*x)*sin(2*x)

Sum of series/ sin2x

Sum of series sin2x

The solution

You have entered [src]

  n           
 __           
 \ `          
  )   sin(2*x)
 /_,          
n = 1

\sum_{n=1}^{n} \sin{\left(2 x \right)}

Sum(sin(2*x), (n, 1, n))

The answer [src]

n*sin(2*x)

n \sin{\left(2 x \right)}

n*sin(2*x)

Examples of finding the sum of a series

The Sum of the Power Series
```
x^n/n
```
```
(x-1)^n
```
Factorial
```
1/2^(n!)
```
```
n^2/n!
```
```
x^n/n!
```
```
k!/(n!*(n+k)!)
```
Flint Hills Series
```
csc(n)^2/n^3
```
Basel problem
```
1/n^2
```
```
1/n^4
```
```
1/n^6
```
Harmonic series
```
1/n
```
Grandi's series
```
(-1)^n
```
Alternating series
```
(-1)^(n + 1)/n
```
```
(n + 2)*(-1)^(n - 1)
```
```
(3*n - 1)/(-5)^n
```
```
(-1)^(n - 1)*n/(6*n - 5)
```
Newton–Mercator series
```
(-1)^(n + 1)/n*x^n
```
Exam the series for convergence
```
(3*n - 1)/(-5)^n
```