(8 points) .1 Section 1.4 a. Prove that (if = (21\"), z 75 O for all k E Z and all z E C. (Him: 2 = rem. I). Use the previous part to show that if 20 is a root of the equation anz\" + an_lz\"1 | - - - + (1.12 + an : 0, where all the coefcients are real numbers, then 20 is also a solution