- #1
izzmach
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Homework Statement
let A be a lowering operator.
Homework Equations
Show that A is a derivative respects to raising operator, A†,
A=d/dA†
The Attempt at a Solution
I start by defining a function in term of A†, which is f(A†) and solve it using [A , f(A†)] but i get stuck after that. Can someone please explain briefly what i should do in the next step?