Q22 of 45 Page 1

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.

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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