documentclass{article}
usepackage{tikz}
usepackage{pgfplots}
begin{document}
    begin{tikzpicture}
    begin{axis}[
    domain=0:5,
    xmin=0, xmax=3,
    ymin=0, ymax=3.5,
    samples=500,
    width=11cm,
    height=6cm,
    axis y line=center,
    axis x line=middle,
    ytick={1},
    xtick={1}
    ]
    addplot[red, very thick, mark=none, domain=0:4] {x^2/sqrt((1-x^2)^2)};
    end{axis}
    end{tikzpicture}
end{document}