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(1)tan∠CEO = OC/EO = 2/EO = 1/3EO = 6, E(-6, 0)对称轴为x = 1, 则B的横坐标为1 + (1 + 6) = 8, B(8, 0)方程为y = a(x + 6)(x - 8) 其常数项为-48a =2a = -1/24y = -x2/24 + x/12 + 2CD的方程: x/(-6) + y/2 = 1, y = x/3 + 2(2)设Q(1, q)OQ斜率为qOP斜率为-1/qOP的方程: y = -x/q与y = x/3 + 2联立得P(-6q/(q + 3), 6/(q + 3))OP2 = 36(q&... |
