Question

訪客

求解

21. The figure shows three points 4(-6,1D,503,力and CO9,-2)
Suppose isapointon the y-axis such that 5D 上5C.
(Find the coordinates of乜

 

(b) Prove that the three points A, D and B lie on the same straightline-

Answer 1

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1234

（0,5）

1234

用第二題往上推就好，但是這樣不太好，畢竟是手寫題