Q. 224.2( 5 Votes )

The scalar product of the vector with the unit vector along the sum of vectors and is equal to one. Find the value of λ.

Answer :

Let




The unit vector along the sum of vector



Given:





λ2 + 4λ + 44 = λ2 + 12λ + 36


4λ - 12λ = 36 - 44


-8λ = -8


λ = 1


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