(1)
图形编号 (1) (2) (3) (4) (5) (6)
棋子个数 6 10 14 18 22 26故答案为:6,10,14,18,22,26.
(2)∵4+2=6,4×2+2=10,4×3+2=14,4×4+2=18,
∴第n个“上”字需用4n+2枚棋子.
故答案为:4n+2.
(1)
图形编号 (1) (2) (3) (4) (5) (6)
棋子个数 6 10 14 18 22 26故答案为:6,10,14,18,22,26.
(2)∵4+2=6,4×2+2=10,4×3+2=14,4×4+2=18,
∴第n个“上”字需用4n+2枚棋子.
故答案为:4n+2.