HJÆLP!!! Differential mono ekstra vm

                   f '(x) = e^x - 4

ekstrema
kræver
                   f '(x_o) = 0 = e^x_o - 4

                   e^x_o = 4

                   x_o = ln(4)

     fortegn for f '(x):                -               0           +
                                      ___________ln(4)_________
    monotoni for f(x):          _{aftagende                voksende}