Lũy thừa

Với a,b >0

• \(a^\alpha.a^\beta.a^\gamma = a^{\alpha +\beta+\gamma}\)
• \((a^\alpha)^\beta = a^{\alpha\beta}\)
• \(a^\alpha.b^\alpha = (a.b)^\alpha\)
• \(a^{-\alpha} = \dfrac{1}{a^\alpha}\)
• \(\sqrt[n]{a^k} = a^\frac{k}{n}\)
• \(\sqrt[m]{\sqrt[n]{a^k}} = \sqrt[m.n]{a^k}=a^\frac{k}{m.n}\)