If A=PDP−1A = P D P^{-1}A=PDP−1, then AkA^kAk is equal to:
PDkP−1P D^k P^{-1}PDkP−1
PkDkP−kP^k D^k P^{-k}PkDkP−k
kPDP−1k P D P^{-1}kPDP−1
PkDP−1P^k D P^{-1}PkDP−1