Question: I need help solving these problems. 1 ) a) Find the vector equation of the tangent line at 1 = 4 to the graph of

I need help solving these problems.

1 ) a) Find the vector equation of the tangent line at 1 = 4 to the graph of r(t) = b) Find the limit lim, -0 2) a) Suppose that "(is a differentiable function with "()| = Show that "() and r (t) are orthogonal. b) Prove that (r(t) . (r'(t) xr"(t))' = r(t) . (r'(t) xr" (t) )

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