(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I've done this problem about 5 times, several different ways following many different examples but I can't seem to find the right answer or even figure out how they got one of the answers (y answer is given)

3. The attempt at a solution

r(t) = (1+4*sqrt(t), t^{5}-t, t^{5}+t)

s(t) = P_{0}+ tv (P and v are vectors)

s(t) = r(0) + tr^{1}(0)

r^{1}(t) = (2/sqrt(t), 5t^{4}-1, 5t^{4}+1)

r^{1}(0) = ????

and this is where i get stuck because trying to substitute 0 in x equation will give you an undefined number...so i'm doing something wrong obviously...please help!!

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Finding the Tangent of a point on a curve (problem driving me crazy )

**Physics Forums | Science Articles, Homework Help, Discussion**