1. The problem statement, all variables and given/known data I'd like some help with 2 problems: Show by using Demoivre's theorem and the geometric series formula that the sum of all n values of z^(1/n) is zero when n >=2. Z is a complex number. Use the geometric series formula and Demoivre's theorem to show that: 2. Relevant equations the geometric series formula: Demoivre's theorem 3. The attempt at a solution For the first part,I've tried to make z^(1/n) = p so that p^n = z ,but I had no success showing that the sum equals zero... For the second part I've made z= cos(theta) + i sin(theta) and I've obtained the left part of the formula,but I can't get the right part... I'd appreciate any help,because I don't seem to be going anywhere. Thank you in advance!