hello all,
I am doing some homework and need some verification on the math:
[Px, Px^2]f= PxPx^2f - Px^2Pxf
Px= -iħd/dx
Px2= -i^2ħ^2d^2/dx^2
-iħd/dx(-i^2ħ^2d^2/dx^2f) - (-i^2ħ^2d^2/dx^2)( -iħd/dxf)
i^3ħ^3d/dx(d^2f/dx^2) - i^3ħ^3 d^2/dx^2(df/dx)
the number following the "^" sign...