Answer:
63, 69, 75, 81
Explanation:
to find the first 4 terms substitute n = 1, 2, 3, 4 into the explicit rule.
a₁ = 63 + (1 - 1) × 6 = 63 + 0 × 6 = 63 + 0 = 63
a₂ = 63 + (2 - 1) × 6 = 63 + 1 × 6 = 63 + 6 = 69
a₃ = 63 + (3 - 1) × 6 = 63 + 2 × 6 = 63 + 12 = 75
a₄ = 63 + (4 - 1) × 6 = 63 + 3 × 6 = 63 + 18 = 81
the first four terms are 63, 69, 75, 81