请教一道数学

with二

GWD Math18Q9:
Is x < 0 ?
(1)     x3< x2

(2)     x3< x
A. Statement (1) ALONE issufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE issufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHERare sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE issufficient.
E. Statements (1) and (2) TOGETHERare NOT sufficient.
我得到的答案是C，但我觉得应该是E。请各位帮忙解惑。谢谢

with二

谢谢
不好意思 选项 2) 应该是 x3 < x4

queenie924

选项A 可以推出 X<1 -----------------------不充分
选项B可以推出 X<-1 或者0<X<1------------不充分
A和B合起来可以推出 0<X<1---------------充分