Question 3340
i as in {{{sqrt(-1)}}}?

i repeats itself over 4 powers:


i = {{{sqrt(-1)}}}
{{{i^2}}} = -1
{{{i^3}}} = -i
{{{i^4}}} = 1


then {{{i^5}}} = i etc


so figure out where {{{i^91}}} comes in this cycle and that is your answer