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Show that if u, v, w, and r are any vectors, thena. u Ï ( v Ï w) + v Ï ( w Ï u) + w Ï ( u Ï v) = 0
b. u Ï v = (u · v Ï i)i + (u · v Ï j)j + (u · v Ï k)k
c. ( u Ï v) · ( w Ï r) =
Suppose v=3i-2j+k and w= i+j-k . Then (2v+3w) / ll (3v+2w) ll is... ?i+?j+?k