Sketch the graph of r(t) = t,t3 . Since r (t) = 1, 3t2 , the unit normal N(t) points in
Chapter 13, Problem 38(choose chapter or problem)
Sketch the graph of r(t) = t,t3 . Since r (t) = 1, 3t2 , the unit normal N(t) points in one of the two directions 3t2, 1 . Which sign is correct at t = 1? Which is correct at t = 1? 39. F
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