Cho hệ vector U={ (1,2,1) ,(0,-1,0),(1,0,1),(2,3,2)} a, tìm số chiều và cơ sở W của không gian con sinh ra bởi hệ vector b, tìm tham số k để u =(2,3,k^2+1) là tổ hợp tuyến tính của W

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?

Solve 4 ln x=2ln25 a) x=5 b) x=25 c) x=625

One positive integer is 2 less than another. the product of the two integers is 24. what are the integers?