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Divisibilty

let\quad all\quad { a }{ i }=1\quad or\quad -1\quad \ if\quad { a }{ 1 }{ a }{ 2 }{ a }{ 3 }{ a }{ 4 }+{ a }{ 2 }{ a }{ 3 }{ a }{ 4 }{ a }{ 5 }+.....{ a }{ n }{ a }{ 1 }{ a }{ 2 }{ a }_{ 3 }=0\ prove\quad that\quad 4|n

Note by Sampad Lahiry
1 year, 9 months ago

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