2. 职称英语
  3. In the rectangular coordinate system, (x, y) is a point on a circle that has cen

In the rectangular coordinate system, (x, y) is a point on a circle that has cen

游客2024-01-12  46
问题 In the rectangular coordinate system, (x, y) is a point on a circle that has center (3, 2) and is tangent to the x-axis at (3, 0).
Quantity A: The least possible value of x
Quantity B: 0
选项 A、Quantity A is greater.
B、Quantity B is greater.
C、The two quantities are equal.
D、The relationship cannot be determined from the information given.
答案 A
解析 圆心(3，2)，x轴与圆相切于(3，0)，说明半径为2。所以圆周最左侧的点是(1，2)，所以X最小值是1，大于0，故答案为A。
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