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Ioanaana10August2006
a fost răspuns

scrie toate numerele divizibile cu 2 forma : 19a,5aa,7a8 , a0a .

Răspuns :

19a
a=0,2,4,6,8

5aa
a=0,2,4,6,8

7a8
a=0,1,2,3,4,5,6,7,8,9

a0a
a=2,4,6,8

 

[tex]\overline{19a}~\vdots~2\\\implies~\{190;~192;~194;~196;~198\}\\\\\overline{5aa}~\vdots~2\\\implies~\{500;~522;~544;~566;~588\}\\\\\overline{7a8}~\vdots~2\\\implies~\{708;~718;~728;~738;~748;~758;~768;~778;~788;~798\}\\\\\overline{a0a}~\vdots~2\\\implies~\{202;~404;~606;~808\}[/tex]




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