jup zoi

H

hiensau99

[TEX]1997^{2002} \equiv 1 [/TEX](mod 2003)
[TEX]1997^6 \equiv 587[/TEX] (mod 2003)
[TEX] 1997^{2008} \equiv 1997^{2002}. 1997^6 \equiv 1.587 \equiv 587[/TEX] (mod 2003)
Vậy: [TEX]1997^{2008}[/TEX] chia 2003 dư 587
 
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