At timet, the position of a particle moving on a curve is given by

x=e^(2t)-e^(-2t) , y=3e^(2t)+e^(-2t)

(a) Find the value oftat which the curve has a horizontal tangent.

t=

(b) Finddy/dxin terms oft.

dy/dx=

(c) Find .

can somone help me do this one...plzzzzz...thanks....

mathation