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Find the Unit Normal Vector N(t) to the Curve R t,2t,t2\left\langle t , 2 t , t ^ { 2 } \right\rangle

Question 20

Multiple Choice

Find the unit normal vector N(t) to the curve r (t) = t,2t,t2\left\langle t , 2 t , t ^ { 2 } \right\rangle when t = 1.


A) 13,23,23\left\langle \frac { 1 } { 3 } , \frac { 2 } { 3 } , \frac { 2 } { 3 } \right\rangle

B) (1,0,0) ( 1,0,0 )
C) (0,1,0) ( 0,1,0)
D) (0,12,12) \left( 0 , \frac { 1 } { \sqrt { 2 } } , \frac { 1 } { \sqrt { 2 } } \right)
E) (235,435,535) \left( - \frac { 2 } { 3 \sqrt { 5 } } , - \frac { 4 } { 3 \sqrt { 5 } } , \frac { 5 } { 3 \sqrt { 5 } } \right)
F) (12,0,12) \left( \frac { 1 } { \sqrt { 2 } } , 0 , \frac { 1 } { \sqrt { 2 } } \right)

G) (12,12,0) \left( \frac { 1 } { \sqrt { 2 } } , \frac { 1 } { \sqrt { 2 } } , 0 \right)

H) (12,12,12) \left( \frac { 1 } { \sqrt { 2 } } , \frac { 1 } { \sqrt { 2 } } , \frac { 1 } { \sqrt { 2 } } \right)

Correct Answer:

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