Matematik Opgave 111-112

Opgave 111

$LaTex: \frac{1}{2}\cdot x +2 = 3 \in x = 2\\ \frac{1}{2}\cdot x +2 = 4 \in x = 4\\ \omega'(3) = ]2;4[ \in \omega(3,5) = ]3;4[\\$