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Joshi sir comment

$L e t t h e l i n e s i n t h e p a i r a r e m_{1} x - y = 0 a n d m_{2} x - y = 0 F i n d p e r p e n d i c u l a r s f r o m (x^{,}, y^{,}) o n l i n e s a n d c a l c u l a t e t h e i r s u m U s e f o r m u l a e m_{1} + m_{2} = - \frac{2 h}{b} a n d m_{1} m_{2} = \frac{a}{b}$ Inform for any issue

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