解题 找出规律并填下一个数: 1, 6, 11, 16, 21, ? — 详细解答步骤

Solve Find the pattern and the next number: 4, 9, 14, 19, 24, ? — Step-by-Step Solution by AhaStep

解题 找出规律并填下两个数: 5, 15, 45, 135, 405, 1215, ?, ?。请解释规律。 — 详细解答步骤