Question

Determinati cifra a stiind ca numarul x= 0,1(a)+0,(a)+0,a(1) este natural."

Answer 1

[tex]x= \frac{\overline{1a}-1}{90} + \frac{a}{9} +\frac{\overline{a1}-a}{90}\\ x=\frac{9+a}{90} + \frac{10a}{90} +\frac{\overline{9a}+1}{90}\\ x= \frac{20a+10}{90} = \frac{2a+1}{9} \\ a=4[/tex]Scrie răspunsul tău aici