6.4 How to inlcude pdf file using tikz picture

\documentclass[11pt]{report} 
\usepackage{amsmath,mathtools} 
\usepackage{graphicx} 
\usepackage{pdfpages} 
\usepackage{tikz} 
\usepackage{pgffor} 
 
\begin{document} 
\pdfximage{file2.pdf} 
\foreach \index in {1,...,\the\pdflastximagepages} 
{ 
   \begin{tikzpicture}[remember picture] 
      \node[inner sep=0pt] at (current page.center) 
         {\includegraphics[page=\index]{file2.pdf}}; 
   \end{tikzpicture} 
} 
\end{document}