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

question 79

Multiple Choice

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

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

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