6. Find the velocity, acceleration, and speed of the following position function r(t) = (3 cos(t), 3 sin(t), t2) 7. A particle moves in a path defined by the vector-valued function r (t ) = (5+3 - t, 2t + 3, 3+2 + t) Find ar and an as functions of t. 8. Compute the following limits lim x-y-1 (z,y)-(2,1) Vx - y - 1 12 - cy lim (z,y)-(0,0) Vx - Vy Portfolio Download Print Activity Details iew this topic M O F K