Guided Proof Prove that a nonempty set is asubspace of a vector space if and only if | StudySoup

Textbook Solutions for Elementary Linear Algebra

Chapter 4 Problem 4.164

Question

Guided Proof Prove that a nonempty set is asubspace of a vector space if and only if isan element of for all scalars and and all vectorsand inGetting Started: In one direction, assume is asubspace, and show by using closure axioms thatis an element of In the other direction,assume is an element of for all scalars andand all vectors and in and verify that isclosed under addition and scalar multiplication.(i) If is a subspace of then use scalar multiplicationclosure to show that and are in Now useadditive closure to get the desired result.(ii) Conversely, assume is in By cleverlyassigning specific values to and show that isclosed under addition and scalar multiplication.

Solution

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The first step in solving 4 problem number 51 trying to solve the problem we have to refer to the textbook question: Guided Proof Prove that a nonempty set is asubspace of a vector space if and only if isan element of for all scalars and and all vectorsand inGetting Started: In one direction, assume is asubspace, and show by using closure axioms thatis an element of In the other direction,assume is an element of for all scalars andand all vectors and in and verify that isclosed under addition and scalar multiplication.(i) If is a subspace of then use scalar multiplicationclosure to show that and are in Now useadditive closure to get the desired result.(ii) Conversely, assume is in By cleverlyassigning specific values to and show that isclosed under addition and scalar multiplication.
From the textbook chapter Vector Spaces you will find a few key concepts needed to solve this.

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full solution

Title Elementary Linear Algebra 7 
Author Ron Larson
ISBN 9781133110873

Guided Proof Prove that a nonempty set is asubspace of a vector space if and only if

Chapter 4 textbook questions

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