If a = 2i+j-k, b=-i+2k, and c=i+2j-2k, (i) Find a unit vector perpendicular to the plane of a and b. (ii) Verify that a×(b×c)=(a.c)b-(a.b)c

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A: I am attaching image so that you understand each and every step.

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A: THE GIVEN QUESTION CAN SOLVED AS SHOWN IN STEP2.

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A: The given question is from vector and can be solved as shown in step2

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A: Hi there, At a time we can answer only one question. So, I have answered first one (#6).

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