In the xy-plane shown, the shaded region consists of all points that lie above the graph of $$y = x^{2} - 4x$$ and below the x-axis. Does the point (a,b) (not shown) lie in the shaded region if b < 0 ?
(1) 0<$$a$$<4
(2) $$a^{2}- 4a < b$$
应版权方要求，不支持在线看题功能，感谢您的理解。
In the xy-plane shown, the shaded region consists of all points that lie above the graph of $$y = x^{2} - 4x$$ and below the x-axis. Does the point (a,b) (not shown) lie in the shaded region if b < 0 ?
(1) 0<$$a$$<4
(2) $$a^{2}- 4a < b$$
正确答案: B