A variable line drawn throgh the point o...

A variable line drawn throgh the point of intersection of the lines `x/a+y/b=1,x/b+y/a=1` meets the coordinate axes in A and B. Then the locus of midpoint of AB is

`2xy(a+b)=ab(x+y)`

`xy(a+b)=ab(x+y)`

`2xy(a+b)=ab(x-y)`

`xy(a+b)=ab(x-y)`

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DIPTI PUBLICATION ( AP EAMET)-STRAIGHT LINES -EXERCISE 1B

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