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1/(x^2+8x+17)

Integral of 1/(x^2+8x+17) dx

Limits of integration:

from to
v

The graph:

from to

Piecewise:

The solution

You have entered [src]
 oo                   
  /                   
 |                    
 |          1         
 |  1*------------- dx
 |     2              
 |    x  + 8*x + 17   
 |                    
/                     
-oo                   
$$\int\limits_{-\infty}^{\infty} 1 \cdot \frac{1}{x^{2} + 8 x + 17}\, dx$$
Integral(1/(x^2 + 8*x + 17), (x, -oo, oo))
Detail solution
We have the integral:
  /                    
 |                     
 |           1         
 | 1*1*------------- dx
 |      2              
 |     x  + 8*x + 17   
 |                     
/                      
Rewrite the integrand
        1                 1        
1*------------- = -----------------
   2                /        2    \
  x  + 8*x + 17   1*\(-x - 4)  + 1/
or
  /                      
 |                       
 |           1           
 | 1*1*------------- dx  
 |      2               =
 |     x  + 8*x + 17     
 |                       
/                        
  
  /                
 |                 
 |       1         
 | ------------- dx
 |         2       
 | (-x - 4)  + 1   
 |                 
/                  
In the integral
  /                
 |                 
 |       1         
 | ------------- dx
 |         2       
 | (-x - 4)  + 1   
 |                 
/                  
do replacement
v = -4 - x
then
the integral =
  /                   
 |                    
 |   1                
 | ------ dv = atan(v)
 |      2             
 | 1 + v              
 |                    
/                     
do backward replacement
  /                              
 |                               
 |       1                       
 | ------------- dx = atan(4 + x)
 |         2                     
 | (-x - 4)  + 1                 
 |                               
/                                
Solution is:
C + atan(4 + x)
The answer (Indefinite) [src]
  /                                    
 |                                     
 |         1                           
 | 1*------------- dx = C + atan(4 + x)
 |    2                                
 |   x  + 8*x + 17                     
 |                                     
/                                      
$$\arctan \left({{2\,x+8}\over{2}}\right)$$
The graph
The answer [src]
pi
$$\pi$$
=
=
pi
$$\pi$$
Numerical answer [src]
3.14159265359215
3.14159265359215
The graph
Integral of 1/(x^2+8x+17) dx

    Use the examples entering the upper and lower limits of integration.