1.

If the vectors 2hati-3hatj+4hatk and hati+2hatj-hatk and m hati - hatj+2hatk are coplanar, then the value of m is

Answer»

`(5)/(8)`
`(8)/(5)`
`-(7)/(4)`
`(2)/(3)`

Solution :GIVEN vectors will be COPLANAR, if `|(2, -3, 4),(1,2,-1),(m,-1,2)|=0`
`implies 2(4-1)+3(2 +m) +4(-1-2m)=0`
`implies m=8/5`


Discussion

No Comment Found

Related InterviewSolutions