Comment on Activity 6
You should have found that
`d/(dt) e^(2t)=2e^(2t)`, `d/(dt) e^(3t)=3e^(3t)`, and `d/(dt) e^(4t)=4e^(4t) text(.)`
This suggests the general formula
`d/(dt) e^(kt)=ke^(kt)`.
This is a special case of a much more general differentiation formula, the Chain Rule, which we take up in Chapter 4.