3. Find the coordinate of the point which divides the joint of (-5,11) and (4, - 7) in the ratio 2:7
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If a point P(x,y) divides a line segment having end points coordinates (x1,y1) and (x2,y2), then coordinates of the point P can be find using formula:
x=m1+m2m1x2+m2x1
y=m1+m2m1y2+m2y1
Let P(x,y) be the point which divides the line joining the points A(−5,11) and B(4,−7) in the ratio 7:2.
x=(7×4+2×(−5))/(7+2)
=(28−10)/9
=18/9
=2
y=(7×(−7)+2×11)/9
=(−49+22)/9
=−27/9
=−3
Therefore, required point is (2,−3).
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