Excercise 2


A(1,1,1) en B(2,1,3) en C(0,1,-1)
the dubblerate (ABCD) = 3
D = ?




0  = 1 k + 2 l
1  = 1 k + 1 l
-1 = 1 k + 3 l
=> l = -1 en k = 2 => hc = (-1/2)

(ABCD) = 3 => (ABCD) = hc / hd => hd = (-1/2)/3 => hd = (-1/6)
=> homogene parameters D = 1, (-1/6)