4 2 - ---*x - 1 = 0 1/2
/ 4 \ lim |2 - ---*x - 1| = oo x->-oo\ 1/2 /
/ 4 \ lim |2 - ---*x - 1| = -oo x->oo\ 1/2 /
/ 4 \ |2 - ---*x - 1| | 1/2 | lim |-------------| = -8 x->-oo\ x /
/ 4 \ |2 - ---*x - 1| | 1/2 | lim |-------------| = -8 x->oo\ x /
4 2 - ---*x - 1 = 1 + 8*x 1/2
4 2 - ---*x - 1 = -1 - 8*x 1/2