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\item �ȉ���\fbox{\hspace{5mm}�@}�ɂ��Ă͂܂錾�t�܂��͎��������Ȃ����B

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\item �֐�$y=ax^2$�̃O���t�͕������ƌĂ΂��Ȑ��ł���B
�������ɂ�\fbox{~\ajMaru{1}~}������C��������\fbox{~\ajMaru{1}~}�Ƃ̌�_��
��������\fbox{~\ajMaru{2}~}�Ƃ����B

\item $y=ax^2$�̃O���t��\fbox{~\ajMaru{3}~}�̃O���t�́C$x$���ɂ��đΏ̂ł���B

\item �֐�$y=x^2$�ł́C$x$�̒l����������ɂ�āC����ɑΉ�����$y$�̒l�́C
$x<0$�̂Ƃ�$y$�̒l��\fbox{~\ajMaru{4}~}����B$x>0$�̂Ƃ�$y$�̒l��\fbox{~\ajMaru{5}~}����B
�܂��C$x=0$�̂Ƃ�$y$��\fbox{~\ajMaru{6}~}~$0$���Ƃ�B

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\item �ȉ��̕\�͑�}�ւő���Ƃ��̏d���Ɨ����̊֌W��\�������̂ł���B
���̊֌W���d��$x$\ajLig{g}�C����$y$�~�Ƃ��ăO���t�ɕ\���Ȃ����B

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$250$ & \ajLig{g}�܂Ł@& $300$�~ \\
$500$ & \ajLig{g}�܂Ł@& $350$�~ \\
$1000$ & \ajLig{g}�܂Ł@& $450$�~ \\
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\item �֐�$y=\dfrac{1}{\>2\>}x^2$�̃O���t�����̍��W���ʂɏ����Ȃ����B������$x$�̕ψ��
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\item $y$��$x$��$2$��ɔ�Ⴗ��Ƃ��C�ȉ��̖₢�ɓ����Ȃ����B
\begin{enumerate}

\item $x=-4$�̂Ƃ�$y=8$�ł���Ƃ����萔�̒l�����߂Ȃ����B

\vfill

\begin{minipage}{8zw}
\begin{center}
\begin{tabular}{r@{}c@{}l}
$\mathstrut$ \\
%$8$ & $\>=\>$ & $a\times (-4)^2$ \\
$\mathstrut$ \\
%$16a$ & $=$ & $8$ \\
%$a$ & $=$ & $\dfrac{1}{\>2\>}$ \\
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\end{center}
\end{minipage}
\begin{minipage}{16zw}
\begin{flushright}
\begin{tabular}{|c|}
\hline
\hspace{30mm} \\[-8pt]
$\mathstrut$ \\[-8pt]
%$\dfrac{1}{\>2\>}$ \\[-8pt]
\hspace{30mm} \\
\hline
\end{tabular}
\end{flushright}
\end{minipage}

\item $x$�̒l��$2$����$5$�܂ő�������Ƃ��̕ω��̊�����$21$�ɂȂ�Ƃ�$y$��$x$�̎��ŕ\���Ȃ����B

\vfill

\begin{minipage}{8zw}
\begin{center}
\begin{tabular}{r@{}c@{}l}
$\mathstrut$ \\
%$\dfrac{25a-4a}{5-2}$ & $\>=\>$ & $21$ \\
$\mathstrut$ \\
%$\dfrac{21a}{3}$ & $=$ & $21$ \\
%$a$ & $=$ & $3$ \\
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\end{center}
\end{minipage}
\begin{minipage}{16zw}

\hspace{10mm}
\begin{tabular}{c|c|c}
\multicolumn{3}{c}{$\mathstrut$} \\
%$x$ & $2$ & $5$ \\
%\hline
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%$y$ &  $4a$ & $25a$ \\
\end{tabular}

\begin{flushright}
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\hline
\hspace{30mm} \\[-6pt]
$\mathstrut$ \\[-6pt]
%$y=3x^2$ \\[-6pt]
\hspace{30mm} \\
\hline
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\end{flushright}
\end{minipage}

\item $x$�̕ψ悪$-1\leqq x \leqq 2$�̂Ƃ��C$y$�̕ψ悪$-6\leqq y \leqq 0$�ƂȂ�B
���̂Ƃ��C$y$��$x$�̎��ŕ\���Ȃ����B

\vfill

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$\mathstrut$ 
%$x=2$�̂Ƃ��ŏ��l$-6$�łȂ���΂Ȃ�Ȃ��̂�

\begin{center}
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$\mathstrut$ \\
%$4a$ & $\>=\>$ & $-6$ \\
%$a$ & $=$ & $-\dfrac{\>3\>}{2}$ \\
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\end{minipage}
\begin{minipage}{16zw}

\hspace{10mm}
\begin{tabular}{c|c|c}
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%$x$ & -1 & 2 \\
%\hline
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%$y$ &  $a$ & $4a$ \\
\end{tabular}

\begin{flushright}
\begin{tabular}{|c|}
\hline
\hspace{30mm} \\[-8pt]
$\mathstrut$ \\[-8pt]
%$y=-\dfrac{\>3\>}{2}x^2$ \\[-8pt]
\hspace{30mm} \\
\hline
\end{tabular}
\end{flushright}
\end{minipage}

\end{enumerate}


\item ���̐}�̕�������$y=ax^2$�̃O���t�ł���B
$y$����̓_$(\>0\>,\>4\>)$��ʂ�C$x$���ɕ��s�Ȓ����ƕ������Ƃ̌�_�����ꂼ��$\mathrm{A}\>,\>\mathrm{B}$
�Ƃ���B��������ɓ_$\mathrm{P}$���Ƃ�C$\triangle \mathrm{ABO}$�Ɩʐς�������$\triangle \mathrm{ABP}$������Ƃ��C
�ȉ��̖₢�ɓ����Ȃ����B�������_$\mathrm{B}$��$x$���W��$4$�Ƃ��܂��B

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\vspace{-1zw}
\begin{enumerate}
\item $a$�̒l�����߂Ȃ����B

\begin{minipage}{12zw}
$\mathstrut$ 
%$B(\>4,\>4)$���

\begin{center}
\begin{tabular}{r@{}c@{}l}
$\mathstrut$ \\
%$4$ & $\>=\>$ & $a\times 4^2$ \\
$\mathstrut$ \\
%$16a$ & $=$ & $4$ \\
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\hline
\hspace{30mm} \\[-8pt]
$\mathstrut$ \\[-8pt]
%$a=\dfrac{1}{\>4\>}$ \\[-8pt]
\hspace{30mm} \\
\hline
\end{tabular}
\end{flushright}
\end{minipage}

\item �_$\mathrm{P}$�̍��W�����߂Ȃ����B�������_$\mathrm{P}$��$x$���W�͐��̐��Ƃ��܂��B

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$\mathstrut$ \\
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$\mathstrut$ \\
%\multicolumn{3}{l}{$x>0$���$x=-4\sqrt{\>2\>}$�͕s�K} \\
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\hspace{30mm} \\
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\end{minipage}

\end{enumerate}

\end{enumerate}

\end{document}
