If the line with direction ratios (1, , ) is perpendicular to the line with direction ratios (-1,2,1) and parallel to the line with direction ratios ( , 1, ) , then ( , ) is

Step-by-step solution

Since line with d r^ s(1, u, ) is perpendicular to line with d r^ s(-1,2,1)-1+2 + =0 2 + =1 Also, ( i + j + k )= i + j + k = and = =1 =1, =-1( , )=(1,-1) .