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Tìm tất cả các hàm số f: Z-->Z thỏa: f( f(x)+f(y) ) = x+y+1, với mọi x,y thuộc Z
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Tìm tất cả các hàm số f: Z-->Z thỏa:
f( f(x)+f(y) ) = x+y+1, với mọi x,y thuộc Z

User Andrew Evt
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Answer:

hello

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User John Linhart
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