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The co-ordinates of the mid-point of lin...

The co-ordinates of the mid-point of line joining the points A and B are (2, -3). If the co-ordinates of point A are (-3, 4), then find the co- ordinates of point B.

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Let the co-ordinates of point B = ` (x_(2),y_(2))`
Given that, `" "(- 3+x_(2)) /(2)=2rArr" "-3+x_(2)=4`
`rArr" "x_(2)=7 and (4+y_(2))/( 2)=-3`
`rArr" "4+y_(2)=-6" " rArr" "y_(2 )=-10`
`therefore` Co-ordinates of point B = (7, -10)
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