Determining Intersection Points of Equations in Quantum Mechanics

[atomqwerty]

Hello,
How can I determinate the intersection points of these equations:

1-(2/a)x

and

+- Exp(-x)

It's from an exercise on quantum mechanics where I don't know why the gradient of the exponential is -1.


YThanks

 

[gb7nash]

As far as I know, this cannot be solved algebraically. This is equivalent to asking what the roots are of 1-(2/a)x +- Exp(-x). The best I can think of is using mathematica/matlab or a numerical technique (if you've learned any).