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Show that two lines a(1)x + b(1) y+ c(1)...

Show that two lines `a_(1)x + b_(1) y+ c_(1) = 0 " and " a_(2)x + b_(2) y + c_(2) = 0 " where " b_(1) , b_(2) ne 0 ` are :
(i) Parallel if `a_(1)/b_(1) = a_(2)/b_(2) `, and (ii) Perpendicular if `a_(1) a_(2) + b_(1) b_(2) = 0 `.

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The correct Answer is:
(i)` a_(2)/b_(2) , (ii) = 0 `
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