What is the value of │x + 7│?
(1) │x + 3│= 14
(2) (x + 2)2 = 169
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
答案是D, 可是我觉得应该是C, 因为按照(1), 得出x=11或x=-17; 按照(2), 得出x=11或x=-15; 二者的交集应该是x=11, 确定了x 的唯一性, 所以应该是C呀? 请高人帮忙指点一下
