# Math Help - parametric derivative

1. ## parametric derivative

At time t, 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 of t at which the curve has a horizontal tangent.
t =

(b) Find dy/dx in terms of t.
dy/dx =

(c) Find .

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

mathation

2. it would be wise to find b before a. setting the derivative = 0 will give the horizontal tangent

3. $\frac{dy}{dx}=\frac{dy/dt}{dx/dt}$