First slide
Introduction to 3-D Geometry
Question

 If the points A,B,C,D are collinear and C,D divide AB in the ratios 2:3,2:3 respectively, then the 

 ratio in which A divides CD is 

Moderate
Solution

Hormonic conjugate points 

m-n:m+n ratio ( externally)

it means 1:5 internally

 

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