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Question
The mid-point of the line segment joining A (- 2 , 0) and B (x , y) is P (6 , 3). Find the coordinates of B.
Solution
Coordinates of P are ,
P (6 , 3) = P `((-2 + "x")/2 , (0 + "y")/2)`
`6 = (- 2 + "x")/2 , 3 = "y"/2`
⇒ 12 = - 2 + x , y = 6
⇒ x = 14
Coordinates of B are (14 , 6)
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