Proof

(related to Proposition: Nth Powers)

By hypothesis, \(n\in\mathbb Z\) is an integer. Note that, together the with the multiplication operation of real numbers "\(\cdot\)", the set \((\mathbb R,\cdot )\) is an Abelian group. Therefore, the \(n\)-th power function \(f:x\to x^n\) is well-defined as an exponentiation of \(x\in\mathbb R\).


Thank you to the contributors under CC BY-SA 4.0!

Github:
bookofproofs


References

Bibliography

  1. Forster Otto: "Analysis 1, Differential- und Integralrechnung einer Veränderlichen", Vieweg Studium, 1983