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Question

A and B are the points (1,2) and (2,3). Find the coordinates of point C on the line segment ABC such that 3AC=4BC.

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Solution

We know that by section formula, the co-ordinates of the points which divide internally the line segment joining the points (x1,y1) and (x2,y2) in the ratio m:n is
(x,y)=(mx2+nx1m+n,my2+ny1m+n)
Since, 3AC=4BC
C divides AB in ratio 4:3
x=8+37=117,andy=12+67=187


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