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The Simple Arithmetic Sequences Let's say we have the simplest of arithmetic sequences. $\{1, 2, 3, \cdot\cdot\cdot, n\}$ And what I want to think abo 阅读全文
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We know that: a = first termr = common ration = number of terms We'r going to use a notation $S_n$ to denote the sum of first n terms as following: $S 阅读全文
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Quadratic Formula: The quadratic equation is as follows: $ax^2+bx+c=0$ The quadratic formula tells us that the solutions to this equation is $x = \fra 阅读全文
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Generally, exctags(1) on FreeBSD is what you know as ctags on Linux based systems. 1. Install exctags from port # cd /usr/ports/devel/ctags # make ins 阅读全文
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安装拼音 # pkg install zh-scim-pinyin 安装五笔 # pkg install zh-scim-tables 配置 ~/.cshrc % ee ~/.cshrc 加入下面两行: setenv XMODIFIERS @im=SCIM setenv LC_CTYPE zh_CN 阅读全文
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baidu{:target="_blank"} cnblog 阅读全文
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1. Preparing the Host First, load the bhyve kernel module: # kldload vmm Then, create a tap interface for the network device in the virtual machine to 阅读全文