-4
2.
3
16. \\ 4 = {(x, y) | x + y = 5} B={(x, y)|2xy=4}=(32)
x+4= 5
>X-4 = 4
,
= 7 x = ]>
Y=2
17. 設集合A={a,b,c}, B={a+1,1, 2},若A=B,則數對(a,b,c)共有
A = {1,2,2}
R = 2, b = 1
A =
{2,1,3}
組解。
18. 設A、B、C為三集合,若AUB={1,2,3,4,5},AUC={2,4,6,8,10},則AU(B∩C)
= ₤1. A 3.4} ₤204}
X (BAC) 2.4}
=
A = {2,4}
B = {1, 3.5} U {1,2,3,4,3}
AU (BNC) =
£1.2.3.43
C = {6.8.10} U £2,4,6,8,10}
19.設A={x|x²-ax-3=0},B= {x\x² + ax+b=0},若A∩B={-1},則數對(a,b)
。