7.拋物線的準線y = 0、焦點(0, - 8),則其方程式為 (A)x2 = - 16(y + 4) (B)(y + 4)2 = - 16x (C)x2 = - 8(y + 4) (D)y2 = 1
9.雙曲線經過( - 1,2),且其漸近線為x + y = 0與x - y = 0,則雙曲線方程式為 (A)x2 - y2 = 0 (B)x2 - y2 = 1 (C)x2 - y2 = 3 (D)y
12.試求f (x) = 4 - 2x - x2在區間[ - 4,4]內的最大值M與最小值m? (A)M = 5、m = - 4 (B)M = 5、m沒有 (C)M沒有、m = - 20 (D)M =