The condition of rthe ines `x=az+b,y=cz+d and x=a_1z+b_1,y=c_1z+d_1` to be perpendicular is (A) `ac_1+a_1c+1=0` (B) `aa_1+cc_1+1=0` (C) `ac_1+bb\'+cc\'=0` (D) `(aa_1+cc_1-1=0`

The condition of the lines x=az+b,y=cz+d and x=a_1z+b_1,y=c_1z+d_1 to be perpendicular is (A) ac_1+a_1c+1=0 (B) aa_1+c c_1+1=0 (C) ac_1+b b\'+c c\'=0 (D) aa_1+c c_1-1=0

The condition for lhe lines x=az+b, y=cz+d and x=a_(1) z+b_(1), y=c_(1)z+d_(1) to be parallel is

Prove that the lines x=az+b,y=cz+d and x=a_1z + b_1,y=c_1z+d_1 are perpendicular if aa_1+"cc"_1+1=0.

Show that the condition for the lines x= a_1z+b_1,y = c_1z+d_1 and x = a_2z+b_2, y = c_2z+ d_2 be perpendicular is a_1a_2+c_1c_2=0

Prove that the lines x=ay +b,z =cy +d and x=a'y +b' z =c'y +a' are perpendicular if aa'+cc' +1=0

If the planes ax+by+cz+d=0anda_(1)x+b_(1)y+c_(1)z+d_(1)=0 be mutually perpendicular , then

the two lines x=ay+b,z=cy+d and x=a\'y+b,z=c\'y+d\' will be perpendicular, if and only if: (A) aa\'+c c' + 1=0 (B) aa\'+b b\'+c c'+1=0 (C) aa\'+b b\'+c c'=0 (D) (a+a\')+(b+b\')+(c+c\')=0

the two lines x=ay+b,z=cy+d and x=a\'y+b,z=c\'y+d\' will be perpendicular, if and only if: (A) aa\'+cc\'=1=0 (B) aa\'+bb\'+cc\'=1=0 (C) aa\'+bb\'+cc\'=0 (D) (a+a\')+(b+b\')+(c+c\')=0

Prove that if the lines x = ay + b, z = cy + d and x = a'y + b', z = c'y + d' are perpendiclar to each other aa' + cc' + 1 = 0.

If the lines x=a_(1)y + b_(1), z=c_(1)y +d_(1) and x=a_(2)y +b_(2), z=c_(2)y + d_(2) are perpendicular, then