اگر $f=\left\{ (2,5),(3,4),(0,-2) \right\}$ و $g=\left\{ (-1,2),(0,3),(2,4),(3,0) \right\}$، تابع $f+g$ کدام است؟
1 )
$\left\{ (2,7),(3,4),(0,-2) \right\}$
2 )
$\left\{ (2,7),(3,4) \right\}$
3 )
$\left\{ (2,9)(3,4) \right\}$
$\left\{ (2,9),(3,4),(0,1) \right\}$