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先畫圖,得出此題可分兩種情况討論(注:下麵答案裏“A1、M1、N1、x1、y1、A2、M2、N2、x2、y2”中的1、2分別表示A、M、N、x、y的下角碼)情况一:向量BA1//向量CD,角A=角D=90度,此時設A1(M1,N1)向量BA1=向量OA1-向…
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