# Chapter 1 Prerequisites필수조건

This is a sample book written in Markdown. You can use anything that Pandoc’s Markdown supports, e.g., a math equation $$a^2 + b^2 = c^2$$.

For now, you have to install the development versions of bookdown from Github:

devtools::install_github("rstudio/bookdown")

Remember each Rmd file contains one and only one chapter, and a chapter is defined by the first-level heading #.

To compile this example to PDF, you need to install XeLaTeX. 이 예제를 PDF로 컴파일하려면, XeLaTeX을 설치해야합니다.