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Question

The point, which divides the line segment joining the points (7,6) and (3,4) in ratio 1:2 internally, lies in the

A
I quadrant
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B
II quadrant
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C
III quadrant
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D
IV quadrant
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Solution

The correct option is A I quadrant
LetthelinebeABwithpointsA(x1,y1)=(7,6)&B(x2,y2)=(3,4).Weknowthatthecoordinatesofthepoint,whichdividesalinesegmentjoiningthepoints(x1,y1)&(x2,y2)internallyinratiom:n,areX=mx2+nx1m+nandY=my2+ny1m+n.HereX=1×3+2×71+2=173whichispositive.AgainY=1×4+6×21+2=163whichispositive.Boththecoordinatesarepositive(X,Y)lieinthefirstquardrant.AnsOptionA.NOTEBoththepointsareinthefirstquardrant.Sothesegment,joiningthem,liesentirelyintheIquardrant.thepoint,dividingthelineinternally,willobviouslylieintheIquardrant.

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