X1 = 3(1) - 1 = 2X2 = 3(2) - 1 = 5X3 = 3(3) - 1 = 8X4 = 3(4) - 1 = 11X5 = 3(5) - 1 = 14

Пять членов последовательности Xn=3n-1: 2, 5, 8, 11, 14.