)determine elementary matrices e1, e2, e3 of type iii such that e3e2e1a = u with u an upper triangular matrix. the matrix e1 should turn the element in position (2,1) into a 0. enter this matrix in matlab as e1 using commands similar to the ones in example 1. the matrix e2 should turn the element in position (3,1) into a zero. enter this matrix in matlab as e2. note that to zero out the entries in column 1, you need to add or subtract a multiple of row 1. once you have found the matrices e1 and e2, compute the product e2e1a in matlab. use format rat so that the entries will be given as fractions. based on the result, determine the matrix e3 that turns the

Which of the choices sean are not true when considering virus behavior

You have a linux system that has a 1000gb hard disk drive, which has a 90gb partition containing an ext4 filesystem mounted to the / directory and a 4gb swap partition. currently, this linux system is only used by a few users for storing small files; however, the department manager wants to upgrade this system and use it to run a database application that will be used by 100 users. the database application and the associated data will take up over 200gb of hard disk space. in addition, these 100 users will store their personal files on the hard disk of the system. each user must have a maximum of 5gb of storage space. the department manager has made it very clear that this system must not exhibit any downtime as a result of hard disk errors. how much hard disk space will you require, and what partitions would you need to ensure that the system will perform as needed? where would these partitions be mounted? what quotas would you implement? what commands would you need to run and what entries to /etc/fstab would you need to create? justify your answers.

Anul 2017 tocmai s-a încheiat, suntem trişti deoarece era număr prim, însă avem şi o veste bună, anul 2018 este produs de două numere prime, 2 şi 1009. dorel, un adevărat colecţionar de numere prime, şi-a pus întrebarea: “câte numere dintr-un interval [a, b] se pot scrie ca produs de două numere prime? “.