如图1,在平面直角坐标系中,已知A(a,0),B(0,b),且a、b满足√a-4+√b+...答:x - (m/4)(x - m) - 4 = 0 4x - mx + m² - 16 = 0 (4 - m)x = 16 - m² = (4+ m)(4 - m)m = 4时,A,M重合,无意义 x = m + 4 N(m+4, m)△AMN, △AMB的底均为AM, S△AMN=(3/2)S△AMB, 只须|N的纵坐标| = (3/2)|B的纵坐标| ...
在平面直角坐标系中,已知动点P(x,y),PM⊥y轴,垂足为M,点N与点P关于x...答:由题意知,点p(x,y),点m(0,y),点n(x,-y)所以mn(x,-2y),op(x,y)又因为op.mn=4,即x2-2y2=4.所以点p的轨迹W的方程为x的平方减2y的平方等于4