# Graphic multiplication --- Introduction ---

Graphic multiplication is an exercise concerning the graphical recognition of the multiplication of functions of one real variable.

The server will give you the graph of two functions f (x) and g(x), whose expressions will be hidden. You will then be presented a certain number of other graphs, corresponding to functions such as f (x)g(x), f (-x)g(x), f (x)g(x-1), etc (see the menu below). And you should locate the one which corresponds to one which will be precised in a question. To give the reply, you can simply click on the graph which you believe to be the good one.

The exercise can be configured by the following parameters.
• Type of the function to recognize:
1. xf (x), xg(x), f (x)g(x) ;
2. f 2(x), g2(x), f (x)g(x) ;
3. f ( x)g( x) ;
4. f (x 1)g(x 1) ;
5. f (x 1)g(x 1), f (x)g(x) 1 ;
6. f 2(x), g2(x), f (x)g(x) ;
7. xf (x), xg(x), f (x)g(x) ;
8. f ( x)g( x) ;
9. xf ( x), xg( x), f ( x)g( x) ;
10. f ( x)g( x), f ( x)+g( x) ;
• Numbre of questions in one session:  1,  2,  3,  4,  5,  6,  7,  8 (The score is attributed only at the end of a session.)
• or you can be asked to recognize each presented curve.

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