Q. 124.1( 12 Votes )

If three points A

Answer :

If these three points lie on a line, the slope will be equal.


So, slope of A(h, 0) and P(a, b) = Slope of A(h, 0) and B(0, k)


Slope of AP


Slope of AB


Now,




bh = - ka + kh


ak + bh = kh


Dividing both sides by kh, we get,



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