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the value of n so that vectors 2i+3j-2k,5i+nj+k and -i+2j+3k may be coplanar, will be....I am not satisfied with the ans....please solve and send.....dont use matrix method please......

the value of n so that vectors 2i+3j-2k,5i+nj+k and -i+2j+3k may be coplanar, will be....I am not satisfied with the ans....please solve and send.....dont use matrix method please......

Grade:11

1 Answers

pravin
11 Points
7 years ago
first see that ,if thevectors lie on the same plane then,take any two of tham and get a vector perpendicular to both,
;,that is find their cross product
if this new vector is perpendicular to first two theen it is certain that it will be perpendicular to the third also.
now using the new found vector and third vector find their dot product and equate with 0,and get the answer.
 

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