@Article{MC-4-66,
author = {},
title = {虚数的意义},
journal = {数学文化},
year = {2013},
volume = {4},
number = {3},
pages = {66--69},
abstract = {<p style="text-align:center"><img src="http://www.global-sci.org/oldweb/mc/issues/4/no3/abstracts/66_1.jpg"/></p><p style="text-align: justify; margin-bottom: 10px;">有人在问答网站Stack Exchange提问：我一直觉得虚数（<span style="text-align: justify;">imaginary number</span>）很难懂。中学老师说，虚数就是-1的平方根。<br/></p><p style="text-align: justify; margin-bottom: 10px;">$$i = \sqrt{-1}$$</p><p style="text-align: justify; margin-bottom: 10px;">可是，什么数的平方等于-1呢？对-1求平方根，计算器直接显示出错！</p><p style="text-align: justify; margin-bottom: 10px;">谁能解释，虚数到底是什么？它有什么用？</p>},
issn = {2617-8656},
doi = {https://doi.org/},
url = {http://global-sci.org/intro/article_detail/mc/11661.html}
}