[問題]GWD17-20

[magic]

For any integers x and y, min(x, y) and max(x, y) denote the minimum and the maximum of x and y, respectively. For example, min(5, 2) = 2 and max(5, 2) = 5. For the integer w, what is the value of min(10, w) ?
(1) w = max(20, z) for some integer z.
(2) w = max(10, w)

答案是D

可以請大家交一下嗎??

[StanleyHuang]

由(1) 可知，w >= 20 所以 min(10, w) = 10

(2)的式子有點怪怪的，不過應該還是可以推論出 w >= 10，所以 min(10, w) = 10

由上可知，選(D)