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Consider the Plane r(s,t)=(3+s5t)i+(5s+5t)j+(510t+s)k\vec { r } ( s , t ) = ( 3 + s - 5 t ) \vec { i } + ( 5 - s + 5 t ) \vec { j } + ( 5 - 10 t + s ) \vec { k }

Question 11

Multiple Choice

Consider the plane r(s,t) =(3+s5t) i+(5s+5t) j+(510t+s) k\vec { r } ( s , t ) = ( 3 + s - 5 t ) \vec { i } + ( 5 - s + 5 t ) \vec { j } + ( 5 - 10 t + s ) \vec { k } Find a normal vector to the plane.


A) 12(i+k) \frac { 1 } { \sqrt { 2 } } ( \vec { i } + \vec { k } )
B) 13(i+jk) \frac { 1 } { \sqrt { 3 } } ( \vec { i } + \vec { j } - \vec { k } )
C) 12(i+j) \frac { 1 } { \sqrt { 2 } } ( \vec { i } + \vec { j } )
D) 13(i+j+k) \frac { 1 } { \sqrt { 3 } } ( \vec { i } + \vec { j } + \vec { k } )
E) 12(ij) \frac { 1 } { \sqrt { 2 } } ( \vec { i } - \vec { j } )

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