Let a = 2 i - j + k, b = i + 2 j - k and c = i + j - 2 k be three vectors. A vector of the type b + c for...

Question

Let a = 2 i - j + k, b = i + 2 j - k and c = i + j - 2 k be three vectors. A vector of the type b + c for some scalar λ, whose projection on a is of magnitude 23 is :

Accepted Answer

(2)

JEE Main 2013 Mathematics question

Solution

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