hey guys... this is a two part question

1. where is the log not analytic

ok so i know its where the Re is less than or equal to 0

and where the Im =0

so i preety much just write log(x+iy+3i)

and equate.. how ever its asking for the log... not the Log

so how do i do that

and lastly how woud i take the log(z+3i)

do i write it as log(re^i@ +3i)

and do ln(r) +.....??

thanks for all the help