已知A(3,1)、 B(2, -3) 、C(7, -1) 及D(x , y)為坐標平面上的四個點。若，則x+ y=？(A) -8(B) - 4(C) 5 (D) 6

問題詳情

23. 已知A(3,1)、 B(2, -3) 、C(7, -1) 及D(x , y)為坐標平面上的四個點。若，則x+ y=？
(A) -8
(B) - 4
(C) 5
(D) 6

參考答案

無參考答案

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