Questão 2118233

\(\begin{matrix} ∞ \\ ∑ \\ n=1 \end{matrix}\) \(\left(-1\right)^{n+1}\ \frac{x^n}{n!}\)

\(\begin{matrix} ∞ \\ ∑ \\ n=1 \end{matrix}\) \(\left(-1\right)^{n+1}\ \frac{x^n}{n}\)

\(\begin{matrix} ∞ \\ ∑ \\ n=1 \end{matrix}\) \(\left(-1\right)^{n+1}\ \frac{x^n}{2^nn}\)

\(\begin{matrix} ∞ \\ ∑ \\ n=1 \end{matrix}\) \(\left(-1\right)^n\ \frac{x^n}{n!}\)