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If a vector 2i+3i+8k is perpendicular to the vector 4 i -4j + $α$ k, then the value of $α$ is

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Correct option is B

For two vectors to be perpendicularA⋅B=0∴(2i+3j+8k)⋅(4j−4i+αk)=0or−8+12+8α=0or 8α=−4 or α=−12

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If a vector 2i+3i+8k is perpendicular to the vector 4 i -4j + α k, then the value of α is

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If a vector 2i+3i+8k is perpendicular to the vector 4 i -4j + $α$ k, then the value of $α$ is