we learned many things so far, but especially I had to review about Exponents
Basic Formulas
(1) am×an=am+n a2×a3=a2+3=a5
(2) am÷an=am−n a5÷a2=a5−2=a3
(3) (am)n=amn (a3)2=a3×2=a6
(4) (ab)n=anbn (ab)3=a3b3
(5) ( ab)n = anbn ( ab)3 = a3b3
a0 = 1
①138 = 3 × 3 × 3 × 3 × 3 × 3 × 3 × 3 = 6561
⓶33)2
= (3 × 3 × 3)2
= (3 × 3 × 3) × (3 × 3 × 3)
= 3 × 3 × 3 × 3 × 3 × 3
= 36
= 33 × 2
a–n =1/an
③a2÷a5=a2−5=a−3
a2÷a5= a2/a5 = a×a/a×a×a×a×a = 1a/3