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Question : 81 of 120
Marks:
+1,
-0
Solution:
since,
and
are collincar vector. Therefore,
=λ.....(i)
∵⋅=27 ⇒||||cos0∘=27 ⇒||⋅√9+36+36=27 ⇒||==3 By Eq. (i),
=λ ⇒||=|λ||| 3=|λ|⋅9 ⇒|λ|=± ∴=±(3+6+6) =±(+2+2)
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