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Question

The vertices of PQR are P(2,1),Q(2,3) and R(4,5). Find equation of the median through the vertex R.

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Solution

In PQR,
P=(2,1)
Q=(2,3)
R=(4,5)

Mid-point of PQ=(x1+x22,y1+y22)=(222,1+32)=(0,2)

Equation of the median through the vertex R is the equation of the line passing through the points (0,2),(4,5)

Since, two points form of the line is yy1=(y2y1x2x1)(xx1)

Equation of the median is
y2=(5240)(x0)

4(y2)=3x

4y8=3x

3x4y+8=0 (Ans)



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