Answered
Hi,
The following input colorizes the entire area above the x-axis.
But the area between graph and x-axis should be colored instead.
- f(x) = x^4 - 5 x^2 - 4
- IntegralBetween[ f , 0 x , 5 , -4 ]
or
- Integral[ f , 5 , -4 ]
The calculated values are correct.
Cheers
Loco
GeoGebra: 4.2.54.0
Java: 1.6.0_43-32bit
OS: Windows 7 Ultimate 64bit
Belonging thread: German speaking users - Bedienung von GeoGebra - Fläche zwischen Graph und x-Achse berechnen
The same problem 
hello
help of GG:
try IntegralBetween[ f , 0 x , -4 ,5 ]
saludos
Hi,
yes, I already knew this solution.
I wanted to report the visual bug.
Besides:
Cheers
Loco
hello
base=2 high=3 is a rectangle over xaxis
base =2 high=-3 is a rectangle under xaxis
but i think that base=-2 high=-3 is not a visual concept ( must be area=+6 over or under the xaxis?)
saludos
Hi mathmagic,
yes of course, all these rectangles include areas of 6 area-units.
But the value of the integral depends on the way you integrate (e.g. from right to left, from left to right, or multiplicated with -1).
Nevertheless the values are not my problem!
GeoGebra accepts the input of values where a > b (this is not an error) and colorizes sometimes the wrong sections.
Loco
Error / Bug still present in:
GeoGebra 4.4.5.0 (22 December 2013)
Java: 1.7.0_40
OS: Windows 8
Architecture: x86 / x86
Thanks: https://jira.geogebra.org/b...
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