问答题 The numbers on the right are formed from the numbers on the left using the same rules. Discover the rule used and replace the question mark. 3 → 15 5 → 23 8 → 35 9 → ?
【正确答案】39. [提示: (× 4) + 3]
【答案解析】(规则为(______ *4 +3)。9*4 +3 =39)