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修改23533题面

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weiye.wang 2024-01-15 19:50:33 +08:00
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题库0.3/Problems.json
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@ -635943,7 +635943,7 @@
}, },
"023533": { "023533": {
"id": "023533", "id": "023533",
"content": "已知数列 $\\{a_n\\}$ 的前 $n$ 项和为 $S_n$, 满足 $a_1=\\dfrac{1}{2}$, $S_{n+1}=S_n+\\dfrac{2 a_n}{2 a_n+1}$.\\\\\n(1) 证明数列 $\\{\\dfrac{1}{a_n}\\}$ 是等差数列, 并求出数列 $\\{a_n\\}$ 的通项公式;\\\\\n(2) 若数列 $\\{b_n\\}$ 满足 $b_n=(2 n + 1)^2a_na_{n+1}$, 求数列 $\\{b_n\\}$ 的前 $n$ 项和 $T_n$;\\\\\n(3) 若数列 $\\{C_n\\}$ 满足 $C_n=(2^n-8) a_n$, 则数列 $C_n$ 最大项和最小项是否存在? 若存在请指出, 若不存在请说明理由.", "content": "已知数列 $\\{a_n\\}$ 的前 $n$ 项和为 $S_n$, 满足 $a_1=\\dfrac{1}{2}$, $S_{n+1}=S_n+\\dfrac{a_n}{2 a_n+1}$.\\\\\n(1) 证明数列 $\\{\\dfrac{1}{a_n}\\}$ 是等差数列, 并求出数列 $\\{a_n\\}$ 的通项公式;\\\\\n(2) 若数列 $\\{b_n\\}$ 满足 $b_n=(2 n + 1)^2a_na_{n+1}$, 求数列 $\\{b_n\\}$ 的前 $n$ 项和 $T_n$;\\\\\n(3) 若数列 $\\{C_n\\}$ 满足 $C_n=(2^n-8) a_n$, 则数列 $C_n$ 最大项和最小项是否存在? 若存在请指出, 若不存在请说明理由.",
"objs": [], "objs": [],
"tags": [ "tags": [
"第四单元", "第四单元",
@ -635956,7 +635956,8 @@
"usages": [], "usages": [],
"origin": "26届寒假作业补充题目", "origin": "26届寒假作业补充题目",
"edit": [ "edit": [
"20240108\t王伟叶" "20240108\t王伟叶",
"20240115\t王伟叶"
], ],
"same": [], "same": [],
"related": [], "related": [],