Introduction to Numerical Sums, Products and Integrals
| NSum[f,{i,imin,Infinity}] | numerical approximation to  f |
| NProduct[f,{i,imin,Infinity}] | numerical approximation to  f |
| NIntegrate[f,{x,xmin,xmax}] | numerical approximation to  |
| NIntegrate[f,{x,xmin,xmax},{y,ymin,ymax}] |
| the multiple integral  |
Numerical sums, products and integrals.
Here is a numerical approximation to  .
| Out[1]= |  |
|
NIntegrate can handle singularities in the integration region.
| Out[2]= |  |
|
You can do numerical integrals over infinite regions.
| Out[3]= |  |
|
Here is a double integral over a triangular domain. Note the order in which the variables are given.
| Out[4]= |  |
|
Here is a double integral over a more complicated domain.
| Out[5]= |  |
|
