Corollary: Real Polynomials of Odd Degree Have at Least One Real Root

(related to Proposition: Limits of Polynomials at Infinity)

Let $p:\mathbb R\to\mathbb R$ be a real polynomial with an odd degree $n$, i.e. $$p(x):=a_nx^n + \ldots + a_1x + a_0.$$ Then there are is at least one real number $x$ such that $p(x)=0.$

Proofs: 1


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References

Bibliography

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