[求助]GWD 1 10

wanders

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，怎么来的啊啊

robert

我看了一下，原题求的是(x-y)^4

所以由1,2可以知道 有4组解，但(x-y)^4的值都是6^4

所以C

wanders

谢谢解答

copy的时候有问题，不知道为什么会这样？一些符号不行/

sammen

呵呵，少点符号。

wanders

copy的时候总是弄错符号，这问题怎么解决阿[em06]