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Find the Unit Tangent Vector for the Curve Given By \mathbf

Question 92

Multiple Choice

Find the unit tangent vector for the curve given by r(t) =15t5,13t3,t) \mathbf { r } ( t ) = \left\langle \frac { 1 } { 5 } t ^ { 5 } , \frac { 1 } { 3 } t ^ { 3 } , t \right) .


A) t4,t2,1) t10+t4\frac { \left\langle t ^ { 4 } , t ^ { 2 } , 1 \right) } { \sqrt { t ^ { 10 } + t ^ { 4 } } }
B) (t4,t2,1) 4t8+4t4+1\frac { \left( t ^ { 4 } , t ^ { 2 } , 1 \right) } { \sqrt { 4 t ^ { 8 } + 4 t ^ { 4 } + 1 } }
C)
t4,t2,1) t8+t4+1\frac { \left\langle t ^ { 4 } , t ^ { 2 } , 1 \right) } { \sqrt { t ^ { 8 } + t ^ { 4 } + 1 } }
D)
t4,t2,1t8+t4\frac { \left\langle t ^ { 4 } , t ^ { 2 } , 1 \right\rangle } { \sqrt { t ^ { 8 } + t ^ { 4 } } }
E) None of these

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