Prep T1 PS 165

[a-jan]

165. If x > y^2 > z^4 , which of the following statements could be true?

I. X > Y >Z
II. Z > Y > X
III. X > Z > Y

(A) I only
(B) I and II only
(C) I and III only
(D) II and III only
(E) I, II, and III

ANS: E

[小花]

I. X > Y >Z 應該您推的出來

II. Z > Y > X
X=1/4
Y=1/3
Z=1/2
故推得
III. X > Z > Y
X=2
Y=-1/2
Z=-1/3
故推得

[a-jan]

see... thanks.