Răspunsuri

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2014-08-06T12:09:27+03:00
D=xy2+yz3+zt4+tx1
D=100x+10y+2+100y+10z+3+100z+10t+4+100t+10x+1

D=110x+110y+110z+110t+10=
D=10*(11x+11y+11z
+11t+1)
D= 5*2*(11x+11y+11z+11t+1)   este divizibil cu 5 oricare ar fi cifrele nenule x,y,t,si z



2 5 2