GeoGebra is a free software and multi-platform dynamic mathematics for teaching, including geometry, algebra and calculus.free software is available for winzoz, Mac OS and Linux, simple interface, minimal and very intuitive, and most importantly a myriad of functions, dall'utilissima graphic representation on Cartesian graph that allows you to draw straight lines, parabolas, hyperbolas and geometric shapes instantly with the ability to find points of intersection between the different equations.
Also interesting is the representation of functions in a few seconds may show the presence of maximum, minimum and flexibility, better yet it is also possible to perform calculations with matrices.
I am not to list all the possibilities offered by this powerful tool because they are really a lot, however I know that thanks to Geogebra trasforamato an examination to another (general mathematics), my vote from 8 / 30 to 28/30, and without using it cunningly during the examination but simply c *** or understanding what I was doing between various limitations, dies, domains, minimum, etc.. using this fantastic software.
is the official website where you can download the application to read the manual and the wiki:
http://www.geogebra.org/cms/
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