Find the value of λ for which 
and 
are perpendicular, where
i. 
and 
ii. 
and
iii. 
and
iv. 
and
i)
Since these two vectors are perpendicular,their dot product is zero.
Ans: 
ii)
Since these two vectors are perpendicular,their dot product is zero.
Ans: λ = 3
iii)
Since these two vectors are perpendicular,their dot product is zero.
Ans: λ = - 2
iv)
Since these two vectors are perpendicular,their dot product is zero.
Ans: λ = - 2
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