If two straight lines whose direction cosines are given by the relations l + m - n = 0, 3l² + m² + cnl = 0 are parallel, then the positive value of c is:

Three Dimensional Geometry: JEE Main 2022 Mathematics question

JEE Main 2022 · 27 Jun, Morning shift · Q2380

JEE Main 202227 Jun, Morning shiftMathematicsMediumThree Dimensional Geometry249× since 2002

If two straight lines whose direction cosines are given by the relations

l + m - n = 0

3{l^2} + {m^2} + cnl = 0

are parallel, then the positive value of c is :

JEE Main 2022 · 27 Jun, Morning shift · Q2380

JEE Main 202227 Jun, Morning shiftMathematicsMediumThree Dimensional Geometry249× since 2002

If two straight lines whose direction cosines are given by the relations

l + m - n = 0

3{l^2} + {m^2} + cnl = 0

are parallel, then the positive value of c is :