If B(x,y)is point on line segment joining points A(a,b)and C(b,a)then prove that x+y=a+b

If B(x,y)is point on line segment joining points A(a,b)and C(b,a)then

1.	If B(x,y)is point on line segment joining points A(a,b)and C(b,a)then prove that x+y=a+b
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