Question

If the line lx+my+n=0, mx+ny+l=0 and nx+ly+m=0 are concurrent then

Answer 1

L1 : lx+my+n=0
L2 : mx+ny+l=0,
L3 : nx+ly+m=0
if l + m + n = 0
then point of coordinates A(1 ; 1 )
verifies all three equations,
therefore : A is the concurrent point of these lines.

Answer 2

if three lines are concurrent hten relation between l,m,n

Answer 3

It's a straight line and the A is the concurrent point of these lines.