Question: Find the derivative, r'(t), of the vector function. r(t) = a + 6tb + tc r'(t) = Find the unit tangent vector T(t) at

Find the unit tangent vector T(t) at the point with the given value of the parameter t. r(t) = (1-2t, 1 + 3t,

Find the derivative, r'(t), of the vector function. r(t) = a + 6tb + tc r'(t) = Find the unit tangent vector T(t) at the point with the given value of the parameter t. r(t) = (1-2t, 1 + 3t, +1/12), t = 3 T(3) =

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