1.
Let P:lx+my+nz=0P:lx+my+nz=0 contain line 1x1=y+42=z+23\frac{1-x}{1}=\frac{y+4}{2}=\frac{z+2}{3}. If PP divides ABAB joining A(3,6,1)A(-3,-6,1) and B(2,4,3)B(2,4,-3) in ratio k:1k:1, then k=k=