Recall that a subset V of R" is a subspace of two conditions hold: Condition (I): For all 7,7 in V one has 7+7 in V. Condition (II): For all 7 in V and all scalars e one has e ·7 in V. (a) Find a subset V of R2 such that condition (I) holds but condition (II) fails. (b) Find a subset V of R? such that condition (II) holds but condition (1) fails.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Recall that a subset V of R" is a subspace of two conditions hold:
Condition (I): For all 7,7 in V one has F+g in V.
Condition (II): For all 7 in V and all scalars c one has e-7 in V.
(a) Find a subset V of R? such that condition (I) holds but condition (II) fails.
(b) Find a subset V of R? such that condition (II) holds but condition (I) fails.
Transcribed Image Text:Recall that a subset V of R" is a subspace of two conditions hold: Condition (I): For all 7,7 in V one has F+g in V. Condition (II): For all 7 in V and all scalars c one has e-7 in V. (a) Find a subset V of R? such that condition (I) holds but condition (II) fails. (b) Find a subset V of R? such that condition (II) holds but condition (I) fails.
Expert Solution
Step 1

Since V is a sub space of Rn, if 

(i) V is closed under vector addition that mean sum of two vector in V is also in V. 

(ii) V is closed under scalar multiplication that means if we multiply any element of V by an element in Rn then the resulting element will also in V.

Now we need to find two subsets V of Rn in which only one of the above condition hold.

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