I'm having trouble with this problem as I haven't discovered a good way to determine the power of a Turing machine. I was under the impression that if a Turing machine can perform the same actions and satifies unrestricted access to unlimited memory they're all pretty much equivalent. Such as multiple tapes and nondeterministic Turing machines.
I am to determine if a and b are equal, more powerful or less powerful then a single-tape Turing machine. Where do I start?
a) A Turing Machine that can only make moves to the right and never left.
b) A Turing Machine that can move right one space or move left two spaces.