Question

determinati nr natrale x si y stind ca xy in baza 10 +yxin baza 10 =44

Answer 1

xy+yx=44;
⇒10x+y+10y+x=44
⇒11x+11y=44
⇒11[x+y]=44⇒x+y=4
⇒x,y∈[[1,3],[3,1],[2,2],[0,4],[4,0]]⇒5 variante de raspuns;