55. 6892-!-item-!-187;#058&005291
Which of the following inequalities has a solution set that, when graphed on the number line, is a single line segment of finite length?
(A) x^4 大於等於 1
(B) x^3 小於等於 27
(C) x^2 大於等於 16
(D) 2 小於等於|x| 小於等於 5
(E) 2 小於等於 3x + 4 小於等於 6
ANS: E
(A)(B)(C)沒問題
請問(D)為什麼不可以選? 選(E) 的理由是??
thanks.