The direction ratios of two parallel lines are 4, 3, -1 and + , 1 + , 2. The value of the pair ( , ) is

JEE Advanced Mathematics question

The direction ratios of two parallel lines are and . The value of the pair is

Answer: (B)

Parallel lines have proportional direction ratios:

= = = -2.

So , and . As printed, is the unique answer. It is not among (a)–(c), and (d) "no fixed value" is

Create a free account to read the complete working (7 steps), and practise questions like this in a timed test.

Question ID VK-109799