TMMATE problema 1

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Beniamin Bogosel
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TMMATE problema 1

Post by Beniamin Bogosel »

Determinati ultimele 2 cifre ale numarului \( A=1^2-2^2+3^2-4^2+...+2007^2-2008^2+2009^2 \).

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Marius Mainea
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Post by Marius Mainea »

\( A=1005\cdot 2009 \)
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