Hi, I'm very confused about these:

1. y=2^ln x

2. y=ln2^x

for #1, wouldn't it be:

y=2^ln x

y'=ln x (2^ln x) (ln 1/x) ?

but the answer in the book says it's y'=ln x (2^ln x) (1/x).

and I have absolutely no idea how to begin #2.

edit:

sorry, but these too:

3. f(x) = Ae^-Bx

book says f'(x) = Ae^-Bx (-B). I don't understand where would the -Bx go

4. f(x) = L/(1+Ae^-Bx)

thank you so much in advance!