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if P(x,y) is any point on the line segment joining the points A(a,0) and B(0,b) then show that x/a + y/b=1

Given that the point P (x, y) lies on the line joining the points A (a, 0) and B (0, b)
Thus, the points A (a, 0), P (x, y) and B (0, b) are collinear points
The area of the triangle formed between these three points is zero



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