Cho hệ các vecto U=((1,2,2);(0,-1,-1);(2,3,3);(1,0,0 )) a) Tim số chiều và một cơ sở W của không gian con sinh bởi hệ vecto U b) tìm tham số K để u=(2,3,k^2 +1) là một tổ hợp tuyến tính của W và suy ra [u]w

Two groups of students were asked how many hours they spent reading each day. the table below shows the numbers for each group: group a 1 2 1 1 3 3 2 2 3 group b 3 2 3 2 2 2 1 1 2 based on the table, which of the following is true? the interquartile range for group a students is 0.5 less than the interquartile range for group b students. the interquartile range for group a students is equal to the interquartile range for group b students. the interquartile range for group a employees is 0.5 more than to the interquartile range for group b students. the interquartile range for group a employees is 1 more than the interquartile range for group b students.