Which of these is the Taylor series of f(x)=ln(1+x)f(x) = \ln(1+x)f(x)=ln(1+x)?
∑n=1∞(−1)n−1xnn\sum_{n=1}^{\infty} (-1)^{n-1} \frac{x^n}{n}∑n=1∞(−1)n−1nxn
∑n=0∞(−1)nxnn\sum_{n=0}^{\infty} (-1)^{n} \frac{x^n}{n}∑n=0∞(−1)nnxn
∑n=1∞xnn\sum_{n=1}^{\infty} \frac{x^n}{n}∑n=1∞nxn
None of the above