1)Find the length of the curve.

r(t)=4t, t²,( (1/6)t^3)

0 ? t ? 1

2)Find the curvature of

r(t) = 9t, t², t³

(9, 1, 1). at the point

? =

3)Use this theorem to find the curvature.

r(t)= 6t?i + 4?sin(t)?j + 4?cos(t)?k

?(t) =