Aim of the applet
Absolute value properties analysis by graphic view
Input data
Grahic view 1:
Points A and B, also you can change them in the graphic view with the mouse.
Graphic view 2:
Point P, also you can change it in the graphic view with the mouse
Definition of interval [-C, C], also you can change it in the graphic view with the mouse
Output data
Graphic view 1:
Checkout of the following property: |A + B| <= |A| + |B|
Graphic view 2:
Checkout of the following property: Si C > 0 y |P| <= C <==> -C <= -|P| <= P <= |P| <= C
