1.
а) A1 = [-1; 2)U[5;7]
б) A2 = [-2; 5)
2.
а) 16 - 8i + i² = 15 - 8i
б) (2-2i)(4-2i)/(16+4) = (8-8i-4i-4)/20 = 4/20 - 12i/20 = 0,2 - 0,6i
с) 6 - 2i + 9i + 3 = 9 + 7i
d) 8 + 2i - 4i + 1 + 20 - 8i + 10i + 4 = 29
4.
a) An = 3n, n∈N
b) An = 1/(n+2), n∈N
c) An = 3^(n-1), n∈N