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Question : 65 of 160
Marks:
+1,
-0
Solution:
A vector which is coplanar to the vectors
2++ and
++ is
a(2++)+b(−+) (2a+b)+(a−b)+(a+b)....(i)
Eq. (i) is orthogonal to
3+2+6 3(2a+b)+2(a−b)+6(a+b)=0 14a+7b=0 2a+b=0 Required unit vector,
=±=±
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