Question: Find the curvature k, the unit tangent vector T, the unit normal vector N, and the binormal vector B at t = t1. r(t) =

Find the curvature k, the unit tangent vector T, the unit normal vector N, and the binormal vector B at t = t1.
r(t) = 1/2ti + t j + 1/3 t3k; t1 = 2

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