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Question

In Fig. 9.6, the point C is the image of point A in line I and line segment BC intersects the line I at P.
Is P that point on line I from which the sum of the distance of points A and B is minimum
1790242_945b8c09070d4f5daf5e6f29720a18af.png

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Solution

Yes.
Since, PA+PB=PC+PB
Now, CP+PB will be minimum when C,P and B lie on the line.

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