6 ABCD is a parallelogram with A(-1,2,0), B(2,3,-1) and C(1,1,4). (a) Use vectors to find the coordinates of D. [4] (b)
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6 ABCD is a parallelogram with A(-1,2,0), B(2,3,-1) and C(1,1,4). (a) Use vectors to find the coordinates of D. [4] (b)
6 ABCD is a parallelogram with A(-1,2,0), B(2,3,-1) and C(1,1,4). (a) Use vectors to find the coordinates of D. [4] (b) Show that the midpoints of the diagonals AC and BD coincide. [3] [7]
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