Mister Exam

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Sum of series:
20
n/2^n
1/n
1/((1+r)^n)
Integral of d{x}:
20
Limit of the function:
20
Identical expressions
twenty
20
Similar expressions
(-1)^(n+1)/log(n+2^0.5)
12(0.73)^(n-1)

Sum of series/ 20

Sum of series 20

The solution

You have entered [src]

$$\sum_{n=61}^{3} 20$$

Sum(20, (n, 61, 3))

The rate of convergence of the power series

The answer [src]

-1140

$$-1140$$

-1140

Numerical answer [src]

-1140.00000000000000000000000000

-1140.00000000000000000000000000

The graph

Sum of series 20

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
```