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If lines p x+q y+r=0,q x+r y+p=0 and r x...

If lines `p x+q y+r=0,q x+r y+p=0` and `r x+p y+q=0` are concurrent, then prove that `p+q+r=0`(where `p ,q ,r` are distinct`)`.

A

`p+q+r=0`

B

`p^(2)+q^(2)+r^(2)=pq+qr+rp`

C

`p^(3)+q^(3)+r^(3)=3pqr`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A, C
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