# Real doubt!

Level
pending

\[ \sum_{n=0}^\infty \frac {1}{(\sqrt{2}-1)\sqrt {2^n}}= \frac {\sqrt {2}}{1-2\sqrt{2}} \]

Level
pending

\[ \sum_{n=0}^\infty \frac {1}{(\sqrt{2}-1)\sqrt {2^n}}= \frac {\sqrt {2}}{1-2\sqrt{2}} \]

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