JEE Main 2019 — Math solution | Fundamenthol

JEE Main2019Math

Q.

If the lines x = ay + b, z = cy + d and $x = a^{'} z + b^{'}, y = c^{'} z + d^{'}$ are perpendicular, then

A
$a b^{'} + b c^{'} + 1 = 0$
B
$c c^{'} + a + a^{'} = 0$
C
$a a^{'} + c + c^{'} = 0$
D
$b b^{'} + c c^{'} + 1 = 0$

Solution

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