Question

if point (a,0),(0,b)∧(1,1)are collinear then 1/a+1/b=

Answer 1

if the points are collinear, their area is 0

using the formula to find the area,

1/2[a(b-1)+0(1-0)+1(0-b)]=0

ab-a-b=0

a+b=0

a=-b

1/a+1/b=-1/b+1/b=0

Answer 2

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Hope it helps you ☺️