Calculating Time Constant of y(t) with Maths Equation

[DrMath]

Homework Statement

Given y(t) = e^(-t) + e^(-t)

How can we find the time constant from maths eqn (systems eqn to be exact)?

Homework Equations

The Attempt at a Solution

t=-1 or 1??

always relate to e^(1)??

 

[berkeman]

Homework Statement

Given y(t) = e^(-t) + e^(-t)

How can we find the time constant from maths eqn (systems eqn to be exact)?

Homework Equations

The Attempt at a Solution

t=-1 or 1??

always relate to e^(1)??

Is there a typo in your first equation? y(t) = e^(-t) + e^(-t) = 2e^(-t) ?

 

[DrMath]

e^(-t) + e^(t)

 

[berkeman]

e^(-t) + e^(t)

That's extremely helpful. Could you please now re-state the question in full? And show your work so far towards a solution?