रेखाएँ a(1)x + b(1)y + c(1) = 0 तथा a(2...

रेखाएँ `a_(1)x + b_(1)y + c_(1) = 0` तथा `a_(2)x + b_(2) y + c_(2) = 0` परस्पर लम्बवत् हैं, यदि -

A

`a_(1)b_(2) -b_(1)a_(2) = 0`

B

`a_(1)a_(2)+b_(1)b_(2) = 0`

C

`a_(1)^(2)b_(2) + b_(1)^(2)a_(2) = 0`

D

`a_(1)b_(1)+a_(2)b_(2) = 0`

Verified by Experts

The correct Answer is:

B

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