Which power series is the Maclaurin series for f(x)=11−2xf(x) = \frac{1}{1-2x}f(x)=1−2x1?
∑n=0∞2nxn\sum_{n=0}^{\infty} 2^n x^n∑n=0∞2nxn
∑n=0∞(−2)nxn\sum_{n=0}^{\infty} (-2)^n x^n∑n=0∞(−2)nxn
∑n=0∞xn2n\sum_{n=0}^{\infty} \frac{x^n}{2^n}∑n=0∞2nxn
∑n=0∞(−1)n2nxn\sum_{n=0}^{\infty} (-1)^n 2^n x^n∑n=0∞(−1)n2nxn