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Consider the points A(4,−1), B(−4,3) and C(−2,7). The line L passes through point C such that it is perpendicular to [AB].
Find the equation of L, and show that it passes through B.
Another point, D, is plotted such that the lines [AB] and [CD] bisect each other.
Find the coordinates of D.
Hence find the distance [AD].
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