Odpowiedź:
a)
an = 3n - n²
a₁ = 3 * 1 - 1² = 3 - 1 = 2
a₂ = 3 * 2 - 2² = 6 - 4 = 2
a₃ = 3 * 3 - 3² = 9 - 9 = 0
a₁₀ = 3 * 10 - 10² = 30 - 100 = - 70
b)
an = (- 1)ⁿ⁺¹ + n
a₁ = (- 1)¹⁺¹ + 1 = (- 1)² + 1 = 1 + 1 = 2
a₂ = ( - 1)²⁺¹ + 2 = ( - 1)³ + 2 = - 1 + 2 = 1
a₃ = (- 1)³⁺¹ + 3 = ( - 1)⁴ + 3 = 1 + 3 = 4
a₁₀ = (- 1)¹⁰⁺¹ + 10 = (- 1)¹¹ + 10 = - 1 + 10 = 9
