Describe the additive inverse of the following vectors: in m 2 * 2
1) A = [[2, 3], [- 1, - 1]]
2) B = (3, 2, 1) in R ^ 3
3) k(x) = ax^2 + bx + c in P_{2}
4) D = [[x, y, z], [1, 2, 4]] in m 2*3