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:

⇒ λ^{2} + 4λ + 44 = λ^{2} + 12λ + 36

⇒ 4λ - 12λ = 36 - 44

⇒ -8λ = -8

∴ λ = 1

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