Question: (uxD) . u = v . (uxv) (cu) X v = u X (CD) = c(u X 5) (u xu) . u = 0 (cu)

 (uxD) . u = v . (uxv) (cu) X v =u X (CD) = c(u X 5) (u xu) . u =0 (cu) . D = u . (cv) = c(u . 5)\f1.
u . 0 = D . u 2. (-u) . D =U . U 3. (-u) X (-U) = -(u XU) 4. uXu = -(UX u)

(uxD) . u = v . (uxv) (cu) X v = u X (CD) = c(u X 5) (u xu) . u = 0 (cu) . D = u . (cv) = c(u . 5)\f1. u . 0 = D . u 2. (-u) . D = U . U 3. (-u) X (-U) = -(u XU) 4. u Xu = -(UX u)

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