7. จงหาโดเมนและเรนจ์ ของฟังก์ชันต่อไปนี้
1. / = (1,2), (3,4), (5,5).(6,7).(8,8)}
f = (5,2),(6,2),(7,2) (8,2). (9,2)
3. f = ((x, y) elx1\y=x}
4. / = ((x, y) e/x1\y =x"}
5. / = (x, y) e R x R y = x^}
6. / = ((x, y)e Rx R\ y = \.x}
7. f = (x, y) 6 Rx R| y = x"}
8. f = 1(x, y)e R x R y= x + 1}
x -9
4. f = (x, y)e Rx R|y =
X-3
10. / = (x, ) e R x R y = x - 4x +7}