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Grade 12th passVectors

the point with position vectors 60i +3j, 40i- 8j and i-52 j are collinear if
  1. a =-40
  2. a=40
  3. a=20
  4. none of these

Profile image of mansi dabriwal
11 Years agoGrade 12th pass
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5 Answers

Profile image of ng29
11 Years ago
hey mansi check the question again as there is no a in all the given vectors 
and post the que again to get it solved
 
Profile image of mansi dabriwal
11 Years ago
ups sry....it is 60i+3j, 40i-8j and  ai-52j....rest same ..
Profile image of VAISHNAVI BATHINA
11 Years ago
DATA IS NOT CORRECT
Profile image of mansi dabriwal
11 Years ago
the  point with position vectors 60i+3j, 40i-8j and  ai-52j  are collinear if 
  1. a =-40
  2. a=40
  3. a=20
  4. none of these
  5.  
Profile image of ng29
11 Years ago
answer is 40
for collinear we can write  AB=X (BC)
WHERE a,b,c ARE THREE GIVEN VECTORES AND ON COMPARING THE COEFFICIENTS OF i and j we get the value of a to be 40
approve if useful
 

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