[tex] a^n=\underbrace{a\cdot a\cdot a\cdot...\cdot a}_{n}\\\\\left(\dfrac{a}{b}\right)^n=\dfrac{a^n}{b^n}\\----------------\\\\\left(\dfrac{5}{3}\right)^3=\dfrac{5}{3}\cdot\dfrac{5}{3}\cdot\dfrac{5}{3}=\dfrac{5^3}{3^3}=\dfrac{125}{27} [/tex]
