if point (a,0),(0,b)&(1,1)are collinear then 1/a+1/b=
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These are collinear so 1-0/1-a=1-b/1
1=1-a-b+ab
a+b=ab
Now , 1/a+1/b=a+b/ab=1
1=1-a-b+ab
a+b=ab
Now , 1/a+1/b=a+b/ab=1
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