1.

Show that the vectors veca=overset^^i-2overset^^j+3overset^^k,vecb=-2overset^^i+3overset^^j-4overset^^kand vecc=overset^i-3overset^j+5overset^^k are coplanar.

Answer»

SOLUTION :`VECA.(vecbxxvecc)=|(1,-2,3),(-2,3,-4),(1,-3,5)|=0`
HENCE, in view of THEOREM `1,veca,vecb"and"vecc` are coplanar vectors.


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