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沒見有圖,所以按敘述做.如不一致,請發圖.(1)直線y = kx - 4k = k(x - 4)A(4,0),B(0,-4k)C(-10,0),對稱軸x =(-10 + 4)/2 = -3y = a(x + 10)(x - 4)x = 0,y = -40a = -4k,k = 10atan∠DBO = 3/4 = DO/ OB = 3/(-4k)k…
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