Prove the following identities that we assumed to calculate [h, x] in [h, p] in class. (a) let a, b and c be arbitrary matrices (possibly infinite dimensional) then prove the following commutator identity: [ab, c] = a[b, c] + [a, c]b . (b) show that the position-momentum commutator [x, p] = i~ generalizes to [x n , p] = i~nxn−1 . (c) assume that f(x) has a convergent taylor expansion, then show that [f(x), p] = i~ df dx (x) .

what type of charge does it have? negative

answer: what are you talking about?

explanation:

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

the components of a vector are the parts of the vectors that are to each other.

b perpendicular