1. [-/1 Points] DETAILS LARCALC11 12.1.004. Find the domain of the vector-valued function. (Enter your answer using interval notation.) r(t) = v9 - +2i + tzj - 3tk Need Help? Read It Submit Answer 2. [-/2 Points] DETAILS LARCALC11 12.1.017. Find r(t) . u(t). r(t) = (7t - 8)i+ _taj + 3k 3 u(t) = thi - 9j + +3k r(t) . u(t) =5. [-/1 Points] DETAILS LARCALC11 12.1.050. Represent the plane curve by a vector-valued function. y = 9 - x2 r(t) =6. [-/2 Points] DETAILS LARCALC11 12.1.055. Sketch the space curve represented by the intersection of the surfaces. Surfaces Parameter Z = x2 + 3V2. X +V =0 X = 4t\f7. [-/1 Points] DETAILS LARCALC11 12.1.069. Find the limit (if it exists). (If an answer does not exist, enter DNE.) sin(6t) lim e/ti + j + e-4tk t - 0 6t