Question: Please teach how to solve 7. Let ;(t) =. Find the unit tangent vector 70) at the point t=0 7. Let r(t) = < It

Please teach how to solve

7. Let ;(t) =. Find the unit tangent vector 70) at the point t=0
7. Let r(t) = < It 3 3, 2e > . Find the unit tangent vector T (t) at the point t=O.
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