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given u= 2i+j-k and v=i-7j+2k find (u*v)v

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math
vectors

asked Oct 31, 2017 in CALCULUS by anonymous
reshown Oct 31, 2017 by bradely

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1 Answer

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u= 2i+j-k

v=i-7j+2k

uv=(2i+j-k)(i-7j+2k)

=21+(1-7)+(-1*2)

=2-7-2

=-7

(u*v)v=-7(i-7j+2k)=-7i+49j-14k

answered Nov 1, 2017 by johnkelly Apprentice

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