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Q.

Given ab0 then the points (a, 0), (0, b), (h, k) are collinear, if

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a

(a-h) (b-k)=2

b

ha+kb=2ab

c

ha+kb=1+2ab

d

ha+kb=1

answer is B.

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Detailed Solution

let A=(a, 0), B=(0, b), C=(h, k)

Given that A, B, C are collinear then area of le ABC=0

12x1-x2x1-x3Xy1-y2y1-y3=0 12a  -ba-h -k=0 -ak+b(a-h)=0 -ak+ab-bh=0 ak+bh-ab=0 ak+bh=ab akab+bhab=1 kb+ha=1 ha+kb=1

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