The Maclaurin series for 11+x\frac{1}{1+x}1+x1 is:
∑n=0∞xn\sum_{n=0}^{\infty} x^n∑n=0∞xn
∑n=0∞(−1)nxn\sum_{n=0}^{\infty} (-1)^n x^n∑n=0∞(−1)nxn
∑n=0∞(−x)n\sum_{n=0}^{\infty} (-x)^n∑n=0∞(−x)n
Both b and c