添加关联题

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wangweiye7840 2023-12-18 14:34:46 +08:00
parent 9dfc8424ef
commit 699bfa1981
1 changed files with 26 additions and 1 deletions

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@ -603359,7 +603359,9 @@
"20230905\t王伟叶"
],
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"related": [],
"related": [
"022941"
],
"remark": "",
"space": "4em",
"unrelated": []
@ -613404,6 +613406,29 @@
"space": "",
"unrelated": []
},
"022941": {
"id": "022941",
"content": "设 $k \\in \\mathbf{R}$, 数列 $\\{a_n\\}$ 满足 $a_n=2 n+k$, 数列 $\\{b_n\\}$ 的通项公式为 $b_n=3^n$.\\\\\n(1) 若 $k=-113$, 设 $c_n=\\dfrac{a_n}{b_n}$, 求数列 $\\{c_n\\}$ 最大项及相应的序数;\\\\\n(2) 若 $k=1$, 设 $d_n=\\begin{cases}a_n,& n \\text{为奇数}, \\\\b_n,& n \\text{为偶数}.\\end{cases}$ 求数列 $\\{d_n\\}$ 的前 $n$ 项和 $S_n$.",
"objs": [],
"tags": [],
"genre": "4em",
"ans": "",
"solution": "",
"duration": -1,
"usages": [],
"origin": "2025届高一上学期周末卷19-20231218修改",
"edit": [
"20230905\t王伟叶",
"20231218\t朱敏慧"
],
"same": [],
"related": [
"022591"
],
"remark": "",
"space": "4em",
"unrelated": []
},
"030001": {
"id": "030001",
"content": "若$x,y,z$都是实数, 则:(填写``\\textcircled{1} 充分非必要、\\textcircled{2} 必要非充分、\\textcircled{3} 充要、\\textcircled{4} 既非充分又非必要''之一)\\\\\n(1) ``$xy=0$''是``$x=0$''的\\blank{50}条件;\\\\\n(2) ``$x\\cdot y=y\\cdot z$''是``$x=z$''的\\blank{50}条件;\\\\\n(3) ``$\\dfrac xy=\\dfrac yz$''是``$xz=y^2$''的\\blank{50}条件;\\\\\n(4) ``$|x |>| y|$''是``$x>y>0$''的\\blank{50}条件;\\\\\n(5) ``$x^2>4$''是``$x>2$'' 的\\blank{50}条件;\\\\\n(6) ``$x=-3$''是``$x^2+x-6=0$'' 的\\blank{50}条件;\\\\\n(7) ``$|x+y|<2$''是``$|x|<1$且$|y|<1$'' 的\\blank{50}条件;\\\\\n(8) ``$|x|<3$''是``$x^2<9$'' 的\\blank{50}条件;\\\\\n(9) ``$x^2+y^2>0$''是``$x\\ne 0$'' 的\\blank{50}条件;\\\\\n(10) ``$\\dfrac{x^2+x+1}{3x+2}<0$''是``$3x+2<0$'' 的\\blank{50}条件;\\\\\n(11) ``$0<x<3$''是``$|x-1|<2$'' 的\\blank{50}条件.",