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Question of Lê Quốc Trần Anh
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Lê Quốc Trần Anh
Coodinator
11/06/2018 at 02:08
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Given a,b,c,d satisfys
\(ab=cd\)
. Prove that:
\(a^5+b^5+c^5+d^5\)
isn't a prime number.
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