![xetex - Wrong parentheses size in \binom with xelatex and unicode-math in displaystyle - TeX - LaTeX Stack Exchange xetex - Wrong parentheses size in \binom with xelatex and unicode-math in displaystyle - TeX - LaTeX Stack Exchange](https://i.stack.imgur.com/YsSKm.png)
xetex - Wrong parentheses size in \binom with xelatex and unicode-math in displaystyle - TeX - LaTeX Stack Exchange
How could one prove the following limit identity: [math]\displaystyle\lim_{n \rightarrow \infty} \left( \dfrac{\sum\limits_{i = 0}^{2^n} \left( \binom{2^{n + 1}}{2i} \cdot x^{2^n - i} \right)}{2^{n + 1} \cdot \prod\limits_{k = 0}^{n - 1} \
![amsmath - Overly large parentheses for binomial coefficient with mtpro2 - TeX - LaTeX Stack Exchange amsmath - Overly large parentheses for binomial coefficient with mtpro2 - TeX - LaTeX Stack Exchange](https://i.stack.imgur.com/gyU9l.png)