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Question

Find the coordinates of the points of trisection of the line segment joining (1,2) and (3,4).

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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)
Let (x1,y1)=(1,2) and (x2,y2)=(3,4)
The ratios of trisection willbe 1:2 and 2:1
Points of trisection is (2x1+x23,2y1+y23),(x1+2x23,y1+2y23)
(13,0),(53,2)

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