Q1. Prove the following equation.



Q2. Let m arbitrary different complex numbers be pi (i = 1, 2, ... , m) and a set of only all pi's be A. Calculate


where n is an integer satisfying

0 … n … m.


Q3. Here you should draw lines. Print this file and answer three questions in the file. A straightedge length of which is about 5 cm is needed.