Hallo,
\( \frac{1}{2^{4 n}} \cdot \frac{2^{n}\left(2^{n}+1\right)}{2} \cdot \frac{2^{n}\left(2^{n}+1\right)}{2}= \)
\( \frac{2^{2 n}\left(2^{n}+1\right)^{2}}{2^{4 n} \cdot 4}= \)
\( \frac{\left(2^{n}+1\right)^{2}}{2^{2 n} \cdot 2^{2}}= \)
\( \frac{\left(2^{n}+1\right)^{2}}{2^{2 n+2}}= \)
\( \frac{\left(2^{n}+1\right)^{2}}{2^{(n+1)^{2}}} \)
\( \left(\frac{2^{n}+1}{2^{n+1}}\right)^{2} \)
Gruß, Silvia