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Solve the followings:(1) If the position vectors of A,B,C are respectively -5i+j , 5i+5j and 10i+7j . Then show that A,B,C are collinear.(2) If vector a= 2i-5j+3k and vector b= i-2j-4k ,then find the value of |3a(vector)+2b(vector)| |
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Answer» Solve the followings: (1) If the position vectors of A,B,C are respectively -5i+j , 5i+5j and 10i+7j . Then show that A,B,C are collinear. (2) If vector a= 2i-5j+3k and vector b= i-2j-4k ,then find the value of |3a(vector)+2b(vector)| |
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