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Grade: 10
        Show that the vectors 3a+7b–c,3a–b–2c and –a+3b+c are coplanar.
2 years ago

Answers : (1)

Arun
23368 Points
							
If 3 vectors are co planar then remember 
 [P Q R ] = 0
Or you can say that their determinants is zero.
 
Regards
Arun (askIITians forum expert)
2 years ago
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