Hey i am having a bit of trouble with these differentiation problems;

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

2. Find the equation to the tangent to y= ln(2-x) at the point where x = -1

3. The tangent at x = 1 to y = x^2e^x cuts the x and y axis at A and B respectively. Find the coordinate of A and B

4. Find the equation of the normal to y = ln √ x at the point where y = -1

Im not sure about any of these but for the first 2 i think you have to differentiate first but im nt really sure..

thanks!