How to solve this equation?

[ha.dnri]

Homework Statement

Ae^(-at) + Be^(-bt) = (A+B)/2

Homework Equations

The Attempt at a Solution

 

[Hootenanny]

Homework Statement

Ae^(-at) + Be^(-bt) = (A+B)/2

Homework Equations

The Attempt at a Solution

What do you mean "solve"? Perhaps if you provided us with a more complete statement of the problem and detailed your attempt/thoughts we would be able to offer more help.