Determine whether is a normed space, where

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Question

Determine whether    is a normed space, where 
  
 Remark: You may select one or more answers.

Answer

No,    does not satisfy homogeneity.

Answer

No, the triangle inequality does not hold for

Answer

No,    does not satisfy positive definiteness.

Answer

Yes,    is a norm.

Answer

The question may not be answered correctly based on the given values.

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