n  a = a a a .... a    sebanyak n Keterangan : a → Basis atau Bilangan Pokok n → Pangkat 1 1. a = a → a  R a 2. 1 = 1 → a  R 0 1 3. a = → a  0 a 4. 0 = 0 → a  0  a → n + − 5. ( a) = n  jika n genap  −  a → n jika n ganjil 2