2007 年

數學 · 共 54 題 · 點擊選項即時核對答案

只看錯題本頁已答 0 / 4

51.

A circle $C$ touches the $y$ -axis. If the coordinates of the centre of $C$ are $(-3,4)$ , then the equation of $C$ is

52.

Let $a$ be a constant. If the circle $x^2+y^2+ax-6y-3=0$ passes through the point $(-2,3)$ , then the area of the circle is

53.

A bag contains $8$ black balls and $5$ white balls. If two balls are drawn randomly from the bag one by one without replacement, then the probability that the two balls are of the same colour is

54.

One letter is chosen randomly from each of the two words 'CUBE' and 'CONE'. Find the probability that the two letters chosen are different.