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Lũy thừa

Với a,b >0

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