2013-7.md

course	course_year	question_number	tags	title	year
Complex Analysis	IB	7	IB 2013 Complex Analysis	Paper 4, Section I, E	2013

State Rouché's theorem. How many roots of the polynomial $z^{8}+3 z^{7}+6 z^{2}+1$ are contained in the annulus $1<|z|<2$ ?