Find the Values Of $x$ Such That the Vectors $( 2 x , x , 9 )$

question 137

Multiple Choice

Find the values of $x$ such that the vectors $( 2 x , x , 9 )$ and $( 6 , x , 3 )$ are orthogonal. Select the correct answer.

• A) \(x = 9 , x = 3\)
• B) \(x = 3 , x = - 3\)
• C) \(x = 9 , x = - 9\)
• D) \(x = - 9 , x = 3\)
• E) \(x = - 9 , x = - 3\)

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A theory by Freud describing how personality develops in childhood through a series of stages centered on erogenous zones.

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