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Question

If C is a point on the line segment joining A(−3,4) and B(2,1) such that AC=2BC, then the coordinates of C is

A
(13,2)
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B
(2,13)
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C
(2,7)
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D
(7,2)
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Solution

The correct option is A (13,2)
Here we apply the section formula: If a point C(x,y) divides the line segment AB joining the points A(x1,y1)&B(x2,y2) in the ratio m:n then we have

x=nx1+mx2m+n&y=ny1+my2m+n.
Let the point is C( x,y), Which divides AB in the ratio of 2:1.
Then the coordinates of C are given by
x=(2×2)+(3×1)2+1=13
y=(2×1)+(1×4)3=2
C(13,2)

723133_680924_ans_8b130bc871ba49dc9f52d4d40e061998.png

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