Question: please show work for all 4 0, use the position vector r(t) = 31 + (1+? )/+ (1+3 ) k . which describes the motion

please show work for all 4

0, use the position vector r(t) = 31 + (1+? )/+ (1+3 ) k . which describes the motion of a particle along a curve nd the unit tangent vector Find the principal normal vector Find the curvature Find the length of the curve from t = 0 to t = 1/2
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