Question

    The value of ╬╗ for which the 2 vectors 2i тАУ j + 2k

    and 3i + ╬╗ j + k are perpendicular is┬а
    A -8 Correct Answer Incorrect Answer
    B 8 Correct Answer Incorrect Answer
    C 2 Correct Answer Incorrect Answer
    D 4 Correct Answer Incorrect Answer

    Solution

    Dot product of two mutually perpendicular vectors is zero. тЗТ 2 x 3 + (-1)╬╗ + 2 x 1 = 0 тЗТ ┬а ╬╗ = 8┬а

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