!! used as default html header if there is none in the selected theme.
--- Introduction ---
Graphic functions is an exercise concerning the graphical recognition of
functions of one real variable. The server will give you the graph
of a function f(x), whose expression will be hidden. You will
then be presented a certain number of other graphs, corresponding
to modifications of
f(x) such as f(-x), 2 f(x), f(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.