Question

check whether (1,-2,5 )is a linear combination of (1,1,1),(1,2,3) and (2,-1,1)​

Answer 1

Answer:

sorry I didn't know this answer

Answer 2

Answer:

express the vector Alfa=(1,-2,5) as a linear combination the vector e1=(1,1,1)e2=(1,2,3)and e3=(2,-1,1)