# Difference between revisions of "LeftSum Command"

From GeoGebra Manual

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;LeftSum( <Function>, <Start x-Value>, <End x-Value>, <Number of Rectangles> ) | ;LeftSum( <Function>, <Start x-Value>, <End x-Value>, <Number of Rectangles> ) | ||

:Calculates the left sum of the function in the interval using ''n'' rectangles. | :Calculates the left sum of the function in the interval using ''n'' rectangles. | ||

− | :{{example|1=<code><nowiki>LeftSum | + | :{{example|1=<code><nowiki>LeftSum(x^2 + 1, 0, 2, 4)</nowiki></code> yields ''a'' = 3.75}} |

:{{Notes|1=<br> | :{{Notes|1=<br> | ||

:*This command draws the rectangles of the left sum as well. | :*This command draws the rectangles of the left sum as well. | ||

:*See also the commands: [[RectangleSum Command|RectangleSum]], [[TrapezoidalSum Command|TrapezoidalSum]], [[LowerSum Command|LowerSum]] and [[UpperSum Command|UpperSum]]}} | :*See also the commands: [[RectangleSum Command|RectangleSum]], [[TrapezoidalSum Command|TrapezoidalSum]], [[LowerSum Command|LowerSum]] and [[UpperSum Command|UpperSum]]}} |

## Revision as of 08:30, 9 October 2017

- LeftSum( <Function>, <Start x-Value>, <End x-Value>, <Number of Rectangles> )
- Calculates the left sum of the function in the interval using
*n*rectangles. **Example:**`LeftSum(x^2 + 1, 0, 2, 4)`

yields*a*= 3.75

**Notes:**

- This command draws the rectangles of the left sum as well.
- See also the commands: RectangleSum, TrapezoidalSum, LowerSum and UpperSum