1-Prove the derivative properties of tanh and sigmoidal nonlinearities (slide 3, nonlinear systems, note the correct version below): £ net -1 f(x)=tanh(x)= net et. e* + e ${(x)=___= it f(x)= 1 -ax 1+ e and f= (1-f) and f=(1-f)

Fig: 1