log_9 log_2 (log_2(256))........... HELP!?

DWRead2016-12-07T17:55:58Z

log₉(log₂(log₂(256))) = log₉(log₂(log₂(2⁸)))
= log₉(log₂(8))
= log₉(log₂(2³))
= log₉(3)
= log₉(9^½)
= ½