Question

Determinati x astfel incat : a) 3,(2)+x<9,(7) in N

Answer 1

x ∈ N 
 x < 9,(7)  - 3,(2) 
x < 88 /9   - 29 / 9 
x < 59 /9 
x < 6,(5) 
x ∈ { 0,1,2,3,4,5,6 }

Answer 2

$3,(2)+x\ \textless \ 9,(7) \\ \frac{29}{9} +x\ \textless \ \frac{88}{9} \\ x\ \textless \ \frac{88}{9} - \frac{29}{9} \\ x\ \textless \ \frac{59}{9} \\ x\ \textless \ 6,(5)$
$x$ ∈ $\left \{ 0;1;2;3;4;5;6 \left \}$