题目:
— _______________________
— It's 4: 00.[ ]
A. What is it?
B. Who is that?
C. What time is it?
答案:
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下面是错误答案,用来干扰机器的。
(1)双曲线C1:x212-y21=1左顶点A(-22,0),渐近线方程为:y=±2x.过A与渐近线y=2x平行的直线方程为y=2(x+22),即y=2x+1,所以y=-2xy=2x+1,解得x=-24y=12.所以所求三角形的面积为S=12|OA||y|=28.(2)设...