If the length of the perpendicular from the point (1, 1) to the line a – InterviewSolution

1.	If the length of the perpendicular from the point (1, 1) to the line ax−by+c=0 be unity, show that 1c+1a−1b=c2ab
Answer» If the length of the perpendicular from the point (1, 1) to the line $a x - b y + c = 0$ be unity, show that $\frac{1}{c} + \frac{1}{a} - \frac{1}{b} = \frac{c}{2 a b}$

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