3. Use the following operator identities: [a,bc]=b[a,c]+ [a,b]c; [ab,c]=a[b,c]+ [a,c]b to show that: a) [x,p" ]= in(np.") ( ruku) 4? = [" d' x] (9 ) [x, F ( P. ) ] = 70p (F( Px. (F denotes a function of the momentum operator)