Find $| \mathrm { v } |$ And $| \mathbf { u } + \mathbf { y } |$

question 85

Multiple Choice

Find $| \mathrm { v } |$ and $| \mathbf { u } + \mathbf { y } |$ , given that $\mathbf { u } = - \mathbf { j }$ and $\mathbf { v } = \mathbf { i }$

• A) \(| \mathrm { v } | = 1\)
• , \(| \mathbf { u } + \mathbf { v } | = \sqrt { 2 }\)
• B) \(| v | = - 1\)
• , \(| \mathbf { u } + \mathbf { v } | = - \sqrt { 2 }\)
• C) \(| \mathrm { v } | = \sqrt { 2 }\)
• , \(| \mathbf { u } + \mathbf { y } | = 1\)
• D) \(| \mathrm { v } | = \sqrt { 2 }\)
• , \(| \mathbf { u } + \mathbf { v } | = \sqrt { 2 }\)
• E)none

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