一般フォーラム

（原文）

\documentclass[11pt,b5paper]{jarticle}

\usepackage{emathP,pifont,amssymb,textcomp}

\begin{document}

\noindent

\blacktriangleright 関数の平行移動・対称移動\\

\textcircled{\scriptsize1} f(x,y)=0をx軸方向にp、y軸方向にq平行移動すると\\

f(x-p,y-q)=0\\

になる。\\

\textcircled{\scriptsize2} 関数f(x,y)=0を点(a,b)に関し対象移動する\\

f(2a-x,2b-y)=0\\

になる。\\

\textcircled{\scriptsize3} 関数f(x,y)=0を\\

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（エラーのログ）

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restricted \write18 enabled.

entering extended mode

(./変になった.tex

pLaTeX2e <2019-04-06> (based on LaTeX2e <2018-12-01>)

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$

l.8 \blacktriangleright

関数の平行移動・対称移動\\

?

(c:/w32tex/share/texmf-dist/tex/latex/amsfonts/umsa.fd)

(c:/w32tex/share/texmf-dist/tex/latex/amsfonts/umsb.fd)

LaTeX Warning: Command \textcircled invalid in math mode on input line 9.

LaTeX Warning: Command \textcircled invalid in math mode on input line 9.

LaTeX Warning: Command \textcircled invalid in math mode on input line 12.

LaTeX Warning: Command \textcircled invalid in math mode on input line 12.

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