英语数学题翻译Let X be a finite set of positive integers and A a subset of X. Prove that there exists a subset B of X such that A equals the set of elements of X which divide an odd number of elements of B.

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英语数学题翻译Let X be a finite set of positive integers and A a subset of X. Prove that there exists a subset B of X such that A equals the set of elements of X which divide an odd number of elements of B.
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英语数学题翻译Let X be a finite set of positive integers and A a subset of X. Prove that there exists a subset B of X such that A equals the set of elements of X which divide an odd number of elements of B.
英语数学题翻译
Let X be a finite set of positive integers and A a subset of X. Prove that there exists a subset B of X such that A equals the set of elements of X which divide an odd number of elements of B.

英语数学题翻译Let X be a finite set of positive integers and A a subset of X. Prove that there exists a subset B of X such that A equals the set of elements of X which divide an odd number of elements of B.
X是正整数的有限集合
A是X的子集
证明存在一个X的子集B,使得A等于X中各元素除去B中的奇数

令X为一个有限正整数集，A为它的子集。证明有一个子集B存在，并且A等于除B中奇数外的X中的元素。
汗，你试着证证看。

（已知）X为一个有限正整数集，A为它的子集。证明X有一个子集B且可使A等于X在除去B中奇数元素之后的元素集合。

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