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                                    Three vectors 7hati-11hatj+hatk, 5hati+3hatj-2hatk and 12hati-8hatj-hatk forms | 
                            
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Answer»  an EQUILATERAL triangle `=7(-3-16)+11(-5+24)+1(-40-36)` `=-133+209-76=0` So, the vectors are collinear  | 
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