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     EduGorilla 
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    Two lines x = ay + b, z = cy + d and x = aʹy + bʹ, z = cʹy + dʹ will be perpendicular if and only if

    Options :-

    1. aaʹ + bbʹ + ccʹ = 0
    2. (a + aʹ) (b + bʹ) (c + cʹ) = 0
    3. aaʹ + ccʹ + 1 = 0
    4. aaʹ + bbʹ + ccʹ + 1 = 0
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Reply To: Two lines x = ay + b, z = cy + d and x = aʹy + bʹ, z = cʹy + dʹ will be per….
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