The qanalog of the derivative, defined by
(1)

For example,
(2)
 
(3)
 
(4)
 
(5)

In the limit , the derivative reduces to the usual derivative.
The qanalog of the derivative, defined by
(1)

For example,
(2)
 
(3)
 
(4)
 
(5)

In the limit , the derivative reduces to the usual derivative.
Weisstein, Eric W. "qDerivative." From MathWorldA Wolfram Web Resource. https://mathworld.wolfram.com/qDerivative.html