【GRE数学】If x is an odd integer,for which of the following equ

【GRE数学】If x is an odd integer,for which of the following equations must y be an even integer?
RT 其他选项都排除了,只剩x+2y=7 & 2x+y=6
PS.by the way,integers between 1 and 100,包括1和100这两个数吗?

水灵玲 1年前已收到2个回答举报

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2x+y=6中y是偶数.因为2x是偶数,因此y只能是偶数,而第一个式子中y不论奇数或偶数,那个式子都有成立的可能.
integers between 1 and 100,应该是包括1和100的.

1年前追问

水灵玲举报

嗯明白了

skj123 幼苗

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the correct answer is 2x+y=6
whatever x is, 2x must be odd integer,so ...

1年前

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