Question

Daca a= 0, (2), calculati 1 supra a

Answer 1

a=0,2
1/a=
1/0,2=
1:02=
5

Answer 2

$\it a=0,(2) =\dfrac{2}{9}\\ \\ \\ \dfrac{1}{a}=\dfrac{1}{\dfrac{2}{9}}=1:\dfrac{2}{9}=1\cdot\dfrac{9}{2}=\dfrac{9}{2}$