扫描二维码，直接登录
题库 / Prep2007E1-DS-130
In the sequence of positive numbers x1, x2, x3, . . . , what is the value of x1 ?
(1) xl = ~$\frac{x_{l-1}}{2}$~ for all integers l > 1
(2) x5 = ~$\frac{x_{4}}{x_{4}+1}$~
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
还没有题目讲解（毕出老师会陆续发布对官方考题的解读，请保持关注）。
这道题没懂，求解。x4和x4+1不应该是互质的吗？ 还有1里面，L还是I还是什么？
登录 或 注册 后可以参加讨论