这题答案是不是错了？大家帮忙看一下吧(GWD-14-10)

Q10:

What is the value of (x - y)⁴?

(1)
              The product of x and y is 7.

(2)
              x and y are integers.

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C，我觉得是E啊

光知道XY的乘积求这个公式怎么求得出Value呢？至少还要知道X和Y各自的四次方啊

没有错,是选C.

xy=7,XY 都是整数,这样有四种组合, x=7,y=1;X=1,Y=7,;X=-1,Y=-7;X=-7,Y=-1

不管哪一种组合,都可以得出(x-y)^4=6^4

呀有犯了想当然的错误啦

多谢