Răspunsuri

2014-05-10T19:33:45+03:00
0,a +0,aa+0,aaa= 2,568

 \frac{a}{10} + \frac{aa}{100} + \frac{aaa}{1000} =2,568

si acuma scriem numerele sub forma zecimala:  \frac{a}{10} + \frac{10a +a}{100}+ \frac{100a +10a+a}{1000} = 2,568
 \frac{a}{10} ^{100} +  \frac{11a}{100} ^{10} +  \frac{111a}{1000}  = 2,568

 \frac{100a+110a+111a}{1000} =2,568^{1000}

a(100+110+111)=2568

321 a=2568

a=8