CHỨNG MINH RẰNG: $\frac{1}{2}$ – $\frac{1}{4}$ + $\frac{1}{8}$ – $\frac{1}{16}$ + $\frac{1}{32}$ – $\frac{1}{64}$ < $\frac{1}{3}$
CHỨNG MINH RẰNG: $\frac{1}{2}$ – $\frac{1}{4}$ + $\frac{1}{8}$ – $\frac{1}{16}$ + $\frac{1}{32}$ – $\frac{1}{64}$ < $\frac{1}{3}$