用砖砌墙，第一层（底层）用了全部砖块的一半多一块，第二层用了余下的砖块的一半多一块，…依此类推，每

super，
十层共用（x+2）（ x+2

4

块:middle" cellpadding="-1" cellspacing="-1"> x+2 8 块:90%"> 10 块;font-size:middle" cellpadding="-1" cellspacing="-1"> 1 2 2 x-14

8

块;font-size，余 x-2

2

块:inline-table:1px solid black"> 1 2 1 2 + x+2

2 3

+…+

1
2
原有砖块共x块，…:middle" cellpadding="-1" cellspacing="-1">
x+2
2

块:inline-table:middle" cellpadding="-1" cellspacing="-1"> x-6 4 块:inline-table:middle" cellpadding="-1" cellspacing="-1"> super，
十层共用（x+2）（ x+2

4

块:middle" cellpadding="-1" cellspacing="-1"> x+2 8 块:90%"> 10 块;font-size:middle" cellpadding="-1" cellspacing="-1"> 1 2 2 x-14

8

块;font-size，余 x-2

2

块:inline-table:1px solid black"> 1 2 1 2 + x+2

2 3

+…+

1
2
原有砖块共x块，…:middle" cellpadding="-1" cellspacing="-1">
x+2
2

块:inline-table:middle" cellpadding="-1" cellspacing="-1"> x-6 4 块:inline-table:middle" cellpadding="-1" cellspacing="-1">