1.

Let vec(a)= vec(i) + vec(j), vec(b)= 2vec(j)-vec(k). If vec(r ) xx vec(a) = vec(b) xx vec(a), vec(r ) xx vec(b) = vec(a) xx vec(b), then (vec(r ))/(|vec(r )|)=

Answer»

`(1)/(sqrt11) (vec(i) + 3vec(j)-vec(k))`
`(1)/(sqrt11) (vec(i) -3vec(j) + vec(k))`
`(1)/(SQRT3) (vec(i) -vec(j) + vec(k))`
`(1)/(sqrt3) (vec(i) + vec(j) -vec(k))`

ANSWER :A


Discussion

No Comment Found

Related InterviewSolutions