Let a =2 i + j - k and b = i +2 j + k be two vectors. Consider a vector c = a + b , , R . If the projection...

Question

Let a =2 i + j - k and b = i +2 j + k be two vectors. Consider a vector c = a + b , , R . If the projection of c on the vector ( a + b ) is 3 2 , then the minimum value of ( c -( a b )) c equals _____

Accepted Answer

18

JEE Advanced 2019 Mathematics question

Solution

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