Some more practice with tensor products. îfa8b is the tensor product of an observable a = at acting in hilbert space and bb acting hilbert space and (2) is any real-valued function, then f(a3 b) is an observable acting on ж. зно. true or false? f(a b) explicit counter-example. f(a) f(b). if true, demonstrate that it is true. if false, provide an explicit counter example.