# Thread: differentiation proof

1. ## differentiation proof

Prove that the second derivative of the Logistics equation:
A=A(max)/1+Ce^-kt is given by A''=A(max)Ck^2e^-kt(Ce^-kt-1)/(1+Ce^-kt)^3

Any help would be greatly appreciated

2. $A= A_{max}(1+ Ce^{-kt})^{-1}$

Can you find the first derivative?