The problem is to determine where the function is increasing, decreasing, concave up and concave down.

1) y=(2x-3)^(1/3)

2) y=1/(1+e^-x)

for the first one, i got the first derivative of (1) 2/3(2x-3)^(-2/3)

but im not sure if this is right.

and i have no idea for the second derivative.

and i really really have no idea for the second problem.