绗?/p>
1
椤?/p>
2018
骞?/p>
07
鏈?/p>
08
鏃ユ暟瀛︾殑楂樹腑鏁板缁勫嵎
涓�锛庤В绛旈锛堝叡
12
灏忛锛?/p>
1
锛庡凡鐭?/p>
{
a
n
}
涓虹瓑宸暟鍒楋紝涓?/p>
a
3
=
锕?/p>
6
锛?/p>
a
6
=0
锛?/p>
锛?/p>
1
锛夋眰
{
a
n
}
鐨勯�氶」鍏紡锛?/p>
锛?/p>
2
锛夎嫢绛夋瘮鏁板垪
{
b
n
}
婊¤冻
b
1
=
锕?/p>
8
锛?/p>
b
2
=a
1
+
a
2
+
a
3
锛屾眰
{
b
n
}
鐨勫墠
n
椤瑰拰鍏紡锛?/p>
2
锛庡凡鐭ュ崟璋冮�掑鐨勭瓑姣旀暟鍒?/p>
{
a
n
}
婊¤冻锛?/p>
a
2
+
a
3
+
a
4
=28
锛屼笖
a
3
+
2
鏄?/p>
a
2
锛?/p>
a
4
鐨勭瓑宸腑
椤癸紟
锛堚厾锛夋眰鏁板垪
{
a
n
}
鐨勯�氶」鍏紡锛?/p>
锛堚叀锛夎嫢
b
n
=a
n
log
a
n
锛?/p>
S
n
=b
1
+
b
2
+
b
3
+
鈥?/p>
+
b
n
锛屽浠绘剰姝ｆ暣鏁?/p>
n
锛?/p>
S
n
+
锛?/p>
n
+
m
锛?/p>
a
n
+
1
锛?
0
鎭掓垚绔嬶紝璇曟眰
m
鐨勫彇鍊艰寖鍥达紟
3
锛庡凡鐭ユ暟鍒?/p>
{
a
n
}
鐨勫墠
n
椤瑰拰涓?/p>
S
n
婊¤冻
S
n
=
锛屼笖
a
1
锕?/p>
1
锛?/p>
2a
2
锛?
a
3
+
7
鎴愮瓑宸暟鍒楋紟
锛?/p>
1
锛夋眰鏁板垪
{
a
n
}
鐨勯�氶」鍏紡锛?/p>
锛?/p>
2
锛変护
b
n
=2log
9
a
n
锛?/p>
n
鈭?/p>
N
*
锛?/p>
锛屾眰鏁板垪
鐨勫墠
n
椤瑰拰
T
n
锛?/p>