a 1 ⋅ a 1 ⋅ a 1 a 1 ⋅ a 1 ⋅ a 1 = a 3 a 3 ( = 1 1 ) = a 3 − 3 = a 0 = 1 _ {\displaystyle {\dfrac {a^{1}\cdot a^{1}\cdot a^{1}}{a^{1}\cdot a^{1}\cdot a^{1}}}={\dfrac {a^{3}}{a^{3}}}\left(={\dfrac {1}{1}}\right)=a^{3-3}={\underline {a^{0}=1}}}
