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kbartlett
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I got a small test tomorrow and i have been working throu exercises but i can't seem to solve this question:
Let V be a vector space over a field F, and let [tex]S\subset S'[/tex] be subsets of V.
a) Show that span(S) is a subspace of V.
b) Show that span(S) is a subset of Span(S').
c) Take [tex] V = R^3 [/tex] and give an example to show that it is possible that Span(S) = Span (S') even though [tex] S \subset S'[/tex] and [tex] S \neq S' [/tex].
d) Let U,W be subspaces of V. Prove that U+W is also a subspace of V.
Let V be a vector space over a field F, and let [tex]S\subset S'[/tex] be subsets of V.
a) Show that span(S) is a subspace of V.
b) Show that span(S) is a subset of Span(S').
c) Take [tex] V = R^3 [/tex] and give an example to show that it is possible that Span(S) = Span (S') even though [tex] S \subset S'[/tex] and [tex] S \neq S' [/tex].
d) Let U,W be subspaces of V. Prove that U+W is also a subspace of V.
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