Question: Use Eq. (3) to calculate the curvature function (t). K(t) = |r' (t) x r(t)|| ||r'()||
Use Eq. (3) to calculate the curvature function κ(t).

r(t) = (4t + 1, 4t − 3, 2t)
K(t) = |r' (t) x r"(t)|| ||r'()||
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