Consider the following subset S={ [x,y,z] ∈ R3 : x=2y, 2y=−z }  of R3 .    Is the zero vector an element of S ? Is S  closed under addition? Is S  closed under scalar multiplication? Is S a subspace of R3?     Answers are yes or no.

Elementary Linear Algebra (MindTap Course List)
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Chapter4: Vector Spaces
Section4.3: Subspaces Of Vector Spaces
Problem 45E: Consider the vector spaces P0,P1,P2,...,Pn where Pk is the set of all polynomials of degree less...
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Consider the following subset S={ [x,y,z] ∈ R3 : x=2y, 2y=−z }  of R3

 

  1. Is the zero vector an element of S ?
  2. Is S  closed under addition?
  3. Is S  closed under scalar multiplication?
  4. Is S a subspace of R3?  

 

Answers are yes or no. 

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