Need help with some Ln and base e functions

1) Find the equation of the tangent to the curve y = e^-x at the point where x = -1.

for this i found the slope of the tangent to curve at x = -1 to be **-e** (not sure if this is correct) and i dunno what to do after that

2) Find the equation of the tangent to the curve y = 2 - e^-x at the point where x = 1.

for this i found the slope of the tangent to curve at x = 1 to be **1/e** (not sure if this is correct) and i dunno what to do after that

3) Find the equation of the tangent to the curve y = ln 2x at the point where x = e/2.

for this i found the slope of the tangent to curve at x = 1 to be **1/2e** (not sure if this is correct) and i dunno what to do after that

Thanks in advance