QUESTION 3 Show that
u E span{(1,2,-1,0),(1,1,0,1),(0,0,- 1.1)} where ū=(2,5, -5.1) by finding scalars
k. I and m such that u=k(1,2,-1,0) + |(1,1,0,1)+ m(0.0,-1,1)

k=
i=
m=​

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