Formula:121

Digital Library of Mathematical Functions ID 1.5.E27

${\displaystyle{\displaystyle\iint_{R}f(x,y)\mathrm{d}A={\lim\sum_{j,k}f(\xi_{j},\eta_{k})(x_{j+1}-x_{j})(y_{k+1}-y_{k})}}}$

Symbols List

• ${\displaystyle{\displaystyle\mathrm{d}\NVar{x}}}$: differential of x
• ${\displaystyle{\displaystyle j}}$: integer
• ${\displaystyle{\displaystyle k}}$: integer
• ${\displaystyle{\displaystyle R}}$: closed rectangle
 

Resources that cite this formula

No records found.