Odpowiedź :
xS
[tex] \frac{ - 1 + ( - 1)}{2} = \frac{ - 2}{2} = \underline{ - 1}[/tex]
yS
[tex] \frac{3 + ( - 1)}{2} = \frac{2}{2} = \underline{ 1}[/tex]
Zatem
[tex] \boxed{ \huge{S = ( - 1,1)}}[/tex]
xS
[tex] \frac{ - 1 + ( - 1)}{2} = \frac{ - 2}{2} = \underline{ - 1}[/tex]
yS
[tex] \frac{3 + ( - 1)}{2} = \frac{2}{2} = \underline{ 1}[/tex]
Zatem
[tex] \boxed{ \huge{S = ( - 1,1)}}[/tex]