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7. If i, J and k are the standard unit basic vectors in 3-space, determine the value of: k . (1- 3k) + (1- 4k)

7. If i, J and k are the standard unit basic vectors in 3-space, determine the value of: k . (1- 3k) + (1- 4k) . (1-4k)- 7/2x k]

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