when I add image in my Latex file with TexMaker in windows, I got an error. My code is following:
\begin{figure}[hbtp]
\centering
\includegraphics[scale=1]{first1.png}
\caption{iamgeTitle}
\end{figure}
show error: undefined control sequence \includegraphics
after that when I try to add \usepackage{graphicx} show error: Can be used only in preamble.
I googled it for solve the problem but failed. How can I solved the problem.