Exam 7: Vector Spaces

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If S spans a subspace of a vector space V, then S is linearly independent in V.

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For every For every   , the set   of all polynomials of degree less than or equal to n is a subspace of   . , the set For every   , the set   of all polynomials of degree less than or equal to n is a subspace of   . of all polynomials of degree less than or equal to n is a subspace of For every   , the set   of all polynomials of degree less than or equal to n is a subspace of   . .

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If S spans a vector space V, but S is not linearly independent in V, then there exists a vector v in S such that the set difference If S spans a vector space V, but S is not linearly independent in V, then there exists a vector v in S such that the set difference   also spans V. also spans V.

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Determine the dimension of the subspace S of Determine the dimension of the subspace S of   consisting of all matrices whose trace is 0. consisting of all matrices whose trace is 0.

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Determine if the set of vectors Determine if the set of vectors   is linearly independent in   . is linearly independent in Determine if the set of vectors   is linearly independent in   . .

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The set V of all nonnegative real numbers, using the usual rules for vector addition and scalar multiplication in R, is a vector space.

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If If   then the polynomial space   is a subspace of   . then the polynomial space If   then the polynomial space   is a subspace of   . is a subspace of If   then the polynomial space   is a subspace of   . .

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Determine the dimension of the subspace S of Determine the dimension of the subspace S of   consisting of all matrices A such that   consisting of all matrices A such that Determine the dimension of the subspace S of   consisting of all matrices A such that

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Let V be the set of all vectors Let V be the set of all vectors   , where x is in R. Using the usual rules for vector addition and scalar multiplication in R<sup>2</sup>, determine if V is a vector space, and if not explain why. , where x is in R. Using the usual rules for vector addition and scalar multiplication in R2, determine if V is a vector space, and if not explain why.

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Determine if the given set is a basis for the vector space Determine if the given set is a basis for the vector space   .   . Determine if the given set is a basis for the vector space   .

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In the vector space In the vector space   , let S be the set of all sequences   such that   . Determine if S is a subspace of   , and if not explain why. , let S be the set of all sequences In the vector space   , let S be the set of all sequences   such that   . Determine if S is a subspace of   , and if not explain why. such that In the vector space   , let S be the set of all sequences   such that   . Determine if S is a subspace of   , and if not explain why. . Determine if S is a subspace of In the vector space   , let S be the set of all sequences   such that   . Determine if S is a subspace of   , and if not explain why. , and if not explain why.

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Determine if Determine if   is in the subspace of   given by   . is in the subspace of Determine if   is in the subspace of   given by   . given by Determine if   is in the subspace of   given by   . .

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In the vector space In the vector space   , let S be the set of matrices A such that   . Determine if S is a subspace of   , and if not explain why. , let S be the set of matrices A such that In the vector space   , let S be the set of matrices A such that   . Determine if S is a subspace of   , and if not explain why. . Determine if S is a subspace of In the vector space   , let S be the set of matrices A such that   . Determine if S is a subspace of   , and if not explain why. , and if not explain why.

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If V is a vector space and If V is a vector space and   for all vectors v and w in V, then V consists of only the zero vector. for all vectors v and w in V, then V consists of only the zero vector.

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Let V be the set of all functions f : R Let V be the set of all functions f : R   R such that   . Using the usual rules for vector addition and scalar multiplication of functions, determine if V is a vector space, and if not explain why. R such that Let V be the set of all functions f : R   R such that   . Using the usual rules for vector addition and scalar multiplication of functions, determine if V is a vector space, and if not explain why. . Using the usual rules for vector addition and scalar multiplication of functions, determine if V is a vector space, and if not explain why.

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Let V be a vector space with vector addition Let V be a vector space with vector addition   and scalar multiplication   , and let W be a vector space with vector addition   and scalar multiplication   . Define     , with addition   and scalar multiplication   . Determine if   is a vector space, and if not explain why. and scalar multiplication Let V be a vector space with vector addition   and scalar multiplication   , and let W be a vector space with vector addition   and scalar multiplication   . Define     , with addition   and scalar multiplication   . Determine if   is a vector space, and if not explain why. , and let W be a vector space with vector addition Let V be a vector space with vector addition   and scalar multiplication   , and let W be a vector space with vector addition   and scalar multiplication   . Define     , with addition   and scalar multiplication   . Determine if   is a vector space, and if not explain why. and scalar multiplication Let V be a vector space with vector addition   and scalar multiplication   , and let W be a vector space with vector addition   and scalar multiplication   . Define     , with addition   and scalar multiplication   . Determine if   is a vector space, and if not explain why. . Define Let V be a vector space with vector addition   and scalar multiplication   , and let W be a vector space with vector addition   and scalar multiplication   . Define     , with addition   and scalar multiplication   . Determine if   is a vector space, and if not explain why. Let V be a vector space with vector addition   and scalar multiplication   , and let W be a vector space with vector addition   and scalar multiplication   . Define     , with addition   and scalar multiplication   . Determine if   is a vector space, and if not explain why. , with addition Let V be a vector space with vector addition   and scalar multiplication   , and let W be a vector space with vector addition   and scalar multiplication   . Define     , with addition   and scalar multiplication   . Determine if   is a vector space, and if not explain why. and scalar multiplication Let V be a vector space with vector addition   and scalar multiplication   , and let W be a vector space with vector addition   and scalar multiplication   . Define     , with addition   and scalar multiplication   . Determine if   is a vector space, and if not explain why. . Determine if Let V be a vector space with vector addition   and scalar multiplication   , and let W be a vector space with vector addition   and scalar multiplication   . Define     , with addition   and scalar multiplication   . Determine if   is a vector space, and if not explain why. is a vector space, and if not explain why.

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If every finite set S in a vector space V fails to span V, then If every finite set S in a vector space V fails to span V, then   . .

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Determine if Determine if   is in the subspace of   given by   . is in the subspace of Determine if   is in the subspace of   given by   . given by Determine if   is in the subspace of   given by   . .

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In the vector space In the vector space   , let S be the set of all functions f such that   . Determine if S is a subspace, and if not explain why. , let S be the set of all functions f such that In the vector space   , let S be the set of all functions f such that   . Determine if S is a subspace, and if not explain why. . Determine if S is a subspace, and if not explain why.

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If If   and   are infinite-dimensional subspaces of a vector space V, then   . and If   and   are infinite-dimensional subspaces of a vector space V, then   . are infinite-dimensional subspaces of a vector space V, then If   and   are infinite-dimensional subspaces of a vector space V, then   . .

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