Mister Exam

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Sum of series:
(3/4)^n
1/((2n-1)*(2n+1))
1/(n*(n+3))
(5/6)^n
Canonical form:
x+25
Integral of d{x}:
x+25
Derivative of:
x+25
Identical expressions
x+ twenty-five
x plus 25
x plus twenty minus five
Similar expressions
1/(x+2)^5
x-25

Sum of series/ x+25

Sum of series x+25

The solution

You have entered [src]

  oo          
 __           
 \ `          
  )   (x + 25)
 /_,          
x = 1

$$\sum_{x=1}^{\infty} \left(x + 25\right)$$

Sum(x + 25, (x, 1, oo))

The radius of convergence of the power series

Given number:
$$x + 25$$
It is a series of species
$$a_{x} \left(c x - x_{0}\right)^{d x}$$
- power series.
The radius of convergence of a power series can be calculated by the formula:
$$R^{d} = \frac{x_{0} + \lim_{x \to \infty} \left|{\frac{a_{x}}{a_{x + 1}}}\right|}{c}$$
In this case
$$a_{x} = x + 25$$
and
$$x_{0} = 0$$
,
$$d = 0$$
,
$$c = 1$$
then
$$1 = \lim_{x \to \infty}\left(\frac{x + 25}{x + 26}\right)$$
Let's take the limit
we find

True

False

The rate of convergence of the power series

The answer [src]

oo

$$\infty$$

oo

Numerical answer

The series diverges

The graph

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
```

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Identical expressions

Similar expressions

Sum of series x+25

The solution

Examples of finding the sum of a series