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ABCD is a rhombus. Its diagonals AC and ...

ABCD is a rhombus. Its diagonals AC and BD intersect at the point M and satisfy BD = 2 AC. If the coordinates of D and M are(1,1) & (2,-1respectively. Then find the coordinates of A

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The correct Answer is:
`(1,(-3)/(2))` or `(3,(-1)/(2))`
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