Question 1

Q1Short answer

1 2 Therefore, l = ,m= , n= 12 +12 + 22 12 +12 + 22 12 +12 + 22 1 1 2  1 1 2  i.e., l = , m= , n= i.e. ±  , ,  are D.C’s of the line. 6 6 6  6 6 6