Cho hệ vector U={(1,2,8);(0,-1,-7);(2,3,9);(1,0,- 6) a) tìm số chiều và 1 cơ sở W tronh ko gian con sinh bởi U b) tìm tham số k để u=(2,3,k^2+1) là 1 tổ hợp tuyến tính của W và tính [u]w

ranks (& how to earn them):

-beginner (needs at least 0 points & 0 brainliest answers)

- hand (needs at least 100 points & 0 brainliest answers)

-ambitious   (needs at least 250 points & 0 brainliest answers)

-virtuoso (needs at least 500 points & 5 brainliest answers)

-expert   (needs at least 1,000 points & 10 brainliest answers)

-ace (needs at least 3,000 points & 15 brainliest answers)

-genius   (needs at least 15,000 points & 50 brainliest answers)

how to award brainliest:

you must wait until 2 people answer to award brainliest. i'm pretty sure that it should be next to the "" and "comments" buttons.  

there still no table

i have no clue what you just said. write a question in english?

48+y= ?

the y is the variable and the ? could also be a variable