granice gorne i dolne Mateusz: Oblicz granice gorna i dolna: a) a_n = 5 + 2 (−1)ⁿ + 3 (−1)^n(n+1)₂ b) b_n = ⁿ⁻¹_{2n + 3} cos ^2πn₃ c) c_n = (−1)ⁿ (1 + ³_n)ⁿ + sin ^nπ₄