Odpowiedź :
a₁ = 1/6, a₂ = 1/3
r = a₂ - a₁
r = 1/3 - 1/6 = 2/6 - 1/6 = 1/6
aₙ = a₁ + (n - 1) * r
aₙ = 1/6 + (n - 1) * 1/6
aₙ = 1/6 + 1/6n - 1/6
aₙ = 1/6n
a₅ = 1/6 * 5 = 5/6
a₁₀ = 1/6 * 10 = 10/6 = 1 i 2/3
a₁₃ = 1/6 * 13 = 13/6 = 2 i 1/6
a₁ = 1/6, a₂ = 1/3
r = a₂ - a₁
r = 1/3 - 1/6 = 2/6 - 1/6 = 1/6
aₙ = a₁ + (n - 1) * r
aₙ = 1/6 + (n - 1) * 1/6
aₙ = 1/6 + 1/6n - 1/6
aₙ = 1/6n
a₅ = 1/6 * 5 = 5/6
a₁₀ = 1/6 * 10 = 10/6 = 1 i 2/3
a₁₃ = 1/6 * 13 = 13/6 = 2 i 1/6