Question #8e2b3

1 Answer
Oct 16, 2017

1i

Explanation:

  • By the rule ab=1ab

=i39=1139

  • By the rule amn=(am)n

=1139=1i(i2)19

  • By the rule i2=1

1i(i2)19=1(1)19i=1119i [As 19 is odd]

  • As 119=1

1119i=1i=1i