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  4. k is a nonzero constant. If k = (a+b/ab) then the straight line (x/a) + (y/b) = 1 passes through the point

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Q. k is a nonzero constant. If $k = \frac{a+b}{ab} $ then the straight line $\frac{x}{a} + \frac{y}{b} = 1$ passes through the point

EAMCETEAMCET 1998Straight Lines

Solution:

$\frac{1}{a} + \frac{1}{b} = k$