24. if the midpoint of the line segment joining the points A(3,4) and B (k,6) is P(x,y) and x+y -10 = 0 , find
the value of k.
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Answer:
P(x, y) =[(3+k)/2,(4+6)/2]
=[ (3+k)/2,5]
Given x+y-10=0
i.e,(3+k)/2 +5-10=0
(3+k)/2-5=0
(3+k)/2=5
3+k=10
k=10-3=7
Therefore k=7
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