[計量] DS2-195
不好意思,我數學不太好
想請問這題
If w, x, y, and z are integers such that w/x and y/z are integers,
is w/x + y/z odd?
(1) wx + yz is odd.
(2) wz + xy is odd.
答案是B
我知道(2)是wz + xy is odd
又知w/x and y/z are integers
則xz應為odd,所以w/x + y/z odd 充份
是這樣解的嗎
那條件一呢？
請問大家又是如何解這題呢？
謝謝
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