\documentclass[12pt]{jsarticle}
\usepackage{amsmath,amssymb}
\pagestyle{empty}
\begin{document}
\setlength{\baselineskip}{22pt}
\begin{flushleft}
{\huge 4}
　$x$の関数$y=x^4-4(a-1)x^3+2(a^2-1)x^2$が極大値をもつような実数$a$の値の範囲を求めよ．
\end{flushleft}
\end{document}
