If (a, 0) , (0,b) , (1,1) are collinear then prove that a + b = ab
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Step-by-step explanation:
three points are collinear area of triangle is 0
x1,y1)=a,0
x2,y2=0,b
x-3,y3=1,1)
x1(y2-y3)+x2(y3-y1)+x3(y1-y2)=0
a(b-1)+0(1-0)+1(0-b)=0
ab-a-b=0
ab=a+b
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