Hi
I am trying to understand a simple subtraction involving e^-x. Actually whole process is related to calculating partial derivative of sigmoid function. I got following from a lecture slide:
dy/dx= (1/(1+e^-x) ) * (e^-x + 1 -1)/(1 + e^-x)
I can't understand how can we remove e^-x from numerator as shown in the attached slide (i.e the last step).
Some body please guide me.
Zulfi.
I am trying to understand a simple subtraction involving e^-x. Actually whole process is related to calculating partial derivative of sigmoid function. I got following from a lecture slide:
dy/dx= (1/(1+e^-x) ) * (e^-x + 1 -1)/(1 + e^-x)
I can't understand how can we remove e^-x from numerator as shown in the attached slide (i.e the last step).
Some body please guide me.
Zulfi.