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TOEIC・英語 大学生・専門学校生・社会人

文章を読んで上の1〜4の問題を解くものです。 分からないのでお願いします

3. Answer the following questions. 1 What is the difference between UNIX and Linux? 2 3 4 Choose one of the words in italics in the text. What is the definition of the word you have chosen? What are the three levels of a Linux system? What are the two main functions of the kernel? [Reading Text] UNIX was initially developed by researchers at Bell Labs in the 1970s. Today, UNIX and its variants are widely used mainly on servers. By far, the most well- known UNIX-like operating system is Linux. Linux is available in different distributions which include the Linux kernel and different collections of software. These distributions have various user interfaces, many experienced users preferring the command-line interface, or shell. Linux distributions include a range of software including text editors. memory. While the mechanics of Linux and other Unix operating systems are complicated, the components of a Linux system can be grouped into three levels. The lowest level is the hardware, such as Central Processing Unit (CPU) and The next level is the kernel. It enables communication between hardware and software, by providing instructions to the CPU and other hardware. The programs that are running on the system, or processes, make up the top level known as the user space. Processes in user space generally only have access to a restricted amount of memory and operations, this is called user mode. The kernel runs in kernel mode which allows it unrestricted access to hardware resources. The kernel provides functions such as process management and memory management. A computer only has limited Random Access Memory (RAM) and processor cores. Process management allows the system to run multiple programs (processes) at the same time even if the CPU can only execute only a few processes at a time. Memory management allows applications to share the system's memory while avoiding potential issues such as memory leak. Included with the kernel are device drivers that provide an interface for applications to communicate with hardware, such as hard drives. System calls allow user processes to access features that are executed at kernel mode, for example creating new processes.

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TOEIC・英語 大学生・専門学校生・社会人

この1〜4の問題お願いします🙏🏼🙏🏼

3. Answer the following questions. 1 What is the difference between UNIX and Linux? 2 3 4 Choose one of the words in italics in the text. What is the definition of the word you have chosen? What are the three levels of a Linux system? What are the two main functions of the kernel? [Reading Text] UNIX was initially developed by researchers at Bell Labs in the 1970s. Today, UNIX and its variants are widely used mainly on servers. By far, the most well- known UNIX-like operating system is Linux. Linux is available in different distributions which include the Linux kernel and different collections of software. These distributions have various user interfaces, many experienced users preferring the command-line interface, or shell. Linux distributions include a range of software including text editors. memory. While the mechanics of Linux and other Unix operating systems are complicated, the components of a Linux system can be grouped into three levels. The lowest level is the hardware, such as Central Processing Unit (CPU) and The next level is the kernel. It enables communication between hardware and software, by providing instructions to the CPU and other hardware. The programs that are running on the system, or processes, make up the top level known as the user space. Processes in user space generally only have access to a restricted amount of memory and operations, this is called user mode. The kernel runs in kernel mode which allows it unrestricted access to hardware resources. The kernel provides functions such as process management and memory management. A computer only has limited Random Access Memory (RAM) and processor cores. Process management allows the system to run multiple programs (processes) at the same time even if the CPU can only execute only a few processes at a time. Memory management allows applications to share the system's memory while avoiding potential issues such as memory leak. Included with the kernel are device drivers that provide an interface for applications to communicate with hardware, such as hard drives. System calls allow user processes to access features that are executed at kernel mode, for example creating new processes.

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数学 大学生・専門学校生・社会人

問題1.3教えて頂きたいです。

4 第1章 術の 問題1.3 0でない整数 a,6,cに対して, 次が成り立つことを示せ。 1.2 約数と倍数 (1)a|bかつ6|a → a=D±6. まず、約数と倍数の定義の復習から始めよう。 (2) a|bかつ6|c → a|c. (3) a|b → ac| bc. 定義1.1 整数a,6に対して、6 = acとなる整数cが存在するとき、 「aはbを割り切る」または 「bはaで割り切れる」 と言い。 a|bと表す。また、aをもの約数 (divisor) と呼び, bをaの 倍数(multiple)と呼ぶ. 一方, aが6を割り切らないときは, atbと表す。 定義1.4 a1,…, an を整数とする。 (1) a1, ,an のすべてを割り切る整数を a1, an の公約数 と呼ぶ、また,最大公約数 GCD(a1,… … , an) を次で定義 する。 * あるiに対してa; +0であるとき, a1,……Qn の公約 数の中で最大のものを GCD(a1,.….,an)とする。 cd 単に約数や倍数と言うときは負の整数も考えていることに注意す る。例えば,6の約数は±1, ±2, ±3, ±6の8個である.ESYe ●GCD(0, ,0) 3D0. 特に,整数 a,bに対して GCD(a,6) = 1 であるとき, a ともは互いに素であると言う。 命題1.2 (1)任意の整数aに対し, ±1 と±aはaの約数である。 (2) 1の約数は+1の二つのみである。 (3) 任意の整数は0の約数であり, 0の倍数は0のみである。 (2) a1, ,a, のすべてで割り切れる整数を a1, an の公倍 数と呼ぶ、また, 最小公倍数 LCM(aj, . ., an) を次で定 の 義する。 [証明明(1) e== +1 とおくと,e.ea=D aであるから, eと eaは *すべてのiに対して a; + 0であるとき, a1,, an の aの約数である。 る正の公倍数の中で最小のものを LCM(a1,.., an) とす 会 (2) aを1の約数とし, ac=1をみたす整数cを取れば、 る。 上い * あるiに対して a;=0であるとき, LCM(a1, .… , an)=0. 1= {ac| = |a||e| >_a|>1. 従って、a = 1, 即ち, a=±1 である。 (3) 任意の整数aに対してa-0=0であること(命題 8.3(1) を 参照)から(3) が従う。 (agad+ ( + + キ ロ 5) GCD はgreatest common divisor の略。 6) LCM は 1east common multiple の略。

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