Hey guys,

Finding hard to solve these derivative:

1) $\displaystyle q = 2e^{-t/2}cos2t $ (don't know how to deal with the index -t/2)

2) $\displaystyle x = e^{2t}t^3(2-t)^4 $ (this seem confusing as don't know what rule to apply)

3) $\displaystyle e^{x+y} + sin3x = 0 $ (not to sure about index agian)

I hope someone can help. Thanks

dadon