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Lienar Algebra please show all work, Question 4. Consider the following statement and proof we
did in class: Proposition. Let V be a vector space over a field F. Then for z epsilon V, we have -
1F . x = -x Proof.
Solution
1)0F x=-0 x=0v
2) (1+(-1))x= 1x+(-1x)=x-x=0v
3)1.x+(-1.x)=x-x=0v
4)x+(-1.x)=x-x=0v
5)-x+x+(-1.x)=-x+x-x=-x+0v
6)0v+(-1.x)=0v-x=-x+0v
7)-1.x+0v=-x+0v
8)-1.x=-x

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