Chứng minh chia hết

D

duc_2605

Cách 2 này em:
$2^{1000} - 2^{995} = 2^{995} . 2^5 - 2^{995} . 1$
= $2^{995} . (2^5 - 1) = 2^{995} . (32 - 1) = 2^{995} . 31$
= $2^{994} . 2 . 31 = 2^{994} . 62$ $\vdots 62$
 
M

manhquynh1234

dễ mà!!!!!!!!!!!!!!!!

2^100-2^995
=2^5 . 2^995 -2^995
=2^995(2^5-1)
=2^995 . 31
=2^994 . 62 chia hết cho 62
Vậy 2^100-2^995 chia hết cho 62
 
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