posted by maths .
a) find the equation of AB, the perpindicular bisector of the line joining the points P(-3,1) and Q(1,9)
(line AB intersects the point at midway of PQ)
b) C is the centre of a circle passing through P and Q. given that QC is parralel to the yaxis, determine theequation of the circle.
(c) the tangents at P and Q intersect at T
(1) find the equation of the tangent at Q
(2) the coordinates at C
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