is either 0 or 1, determine th… Show more Suppose that (x1, x2, …, xn) is a vector of numbers. (a) If each xi is either 0 or 1, determine the number of vectors such that their sum x1 + x2 + . . . + xn is odd. (b) Now xi can be 0, 1 or 2. If On is the number of vectors with odd sum, what is the relation between On+1 and On? • Show less