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ANKUR GUPTA Grade: 12
        

If the image of a point (4,-6) by a line mirror to be(2,1) then the equation of the line mirror is...................

8 years ago

Answers : (1)

pratham ashish
9 Points
										Hi,


if v will join these two pts , line joining these points will be perpendicular to mirror ,

more over the mirror will be equidistnt frm both points , hence will be passing through the mid point of the line joining these.


mid pt = {(4+2)/2, (-6+1)/2} = (3, -5/2)

slope = -1/m where m = slope of line joing pts

= -{4-2/-6-1}= 2/7

now eqn => y-1=2/7*(x-2)

7y -2x -3=0


8 years ago
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