(a⋅b)c=⟨1,0,−2⟩; (a⋅c)b=⟨1,0,−1⟩(\bold{a}\cdot\bold{b})\bold{c} = \lang 1,0,-2\rang;\; (\bold{a}\cdot\bold{c})\bold{b} =\lang 1,0,-1\rang(a⋅b)c=⟨1,0,−2⟩;(a⋅c)b=⟨1,0,−1⟩