收录高三寒假作业60新题

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wangweiye7840 2024-01-25 14:06:09 +08:00
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"024082": {
"id": "024082",
"content": "若在等差数列 $\\{a_n\\}$ 中, $a_4+a_8=10$, $a_{10}=6$, 则公差 $d=$\\blank{50}.",
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"genre": "填空题",
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"origin": "自拟题目",
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"20240125\t毛培菁"
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"024083": {
"id": "024083",
"content": "在等差数列 $\\{a_n\\}$ 中, 若 $S_n$ 为 $\\{a_n\\}$ 的前 $n$ 项和, $2 a_7=a_8+5$, 则 $S_{11}$ 的值是\\blank{50}.",
"objs": [],
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"genre": "填空题",
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"duration": -1,
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"20240125\t毛培菁"
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"024084": {
"id": "024084",
"content": "设等差数列 $\\{a_n\\}$ 的前 $n$ 项和为 $S_n$, 若 $a_m=4$, $S_m=0$, $S_{m+2}=14,$($m \\geq 2$, $m \\in \\mathbf{N}$), 则 $a_{2023}$的值为\\blank{50}.",
"objs": [],
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"genre": "填空题",
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"duration": -1,
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"20240125\t毛培菁"
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"024085": {
"id": "024085",
"content": "已知等差数列 $\\{a_n\\}$ 的前 $n$ 项和为 $S_n$, 若 $S_7=a_4$, 则以下结论中正确的是\\blank{50}.(填序号)\\\\\n\\textcircled{1} $a_1+a_3=0$; \\textcircled{2} $a_3+a_5=0$; \\textcircled{3} $S_3=S_4$; \\textcircled{4} $S_4=S_5$.",
"objs": [],
"tags": [],
"genre": "填空题",
"ans": "",
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"duration": -1,
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"origin": "自拟题目",
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"20240125\t毛培菁"
],
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"remark": "",
"space": "",
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"024086": {
"id": "024086",
"content": "等差数列 $\\{a_n\\}$ 中, 若 $S_n$ 是其前 $n$ 项和, $a_1=-9$, $\\dfrac{S_9}{9}-\\dfrac{S_7}{7}=2$, 则 $a_n=$\\blank{50}.",
"objs": [],
"tags": [],
"genre": "填空题",
"ans": "",
"solution": "",
"duration": -1,
"usages": [],
"origin": "自拟题目",
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"20240125\t毛培菁"
],
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"remark": "",
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},
"024087": {
"id": "024087",
"content": "等差数列 $\\{a_n\\}$ 的各项均不为零, 其前 $n$ 项和为 $S_n$. 若 $a_{n+1}^2=a_{n+2}+a_n$, 则 $S_{2 n+1}=$\\blank{50}.",
"objs": [],
"tags": [],
"genre": "填空题",
"ans": "",
"solution": "",
"duration": -1,
"usages": [],
"origin": "自拟题目",
"edit": [
"20240125\t毛培菁"
],
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"remark": "",
"space": "",
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},
"024088": {
"id": "024088",
"content": "已知 $S_n$ 是等差数列 $\\{a_n\\}$ 的前 $n$ 项和, 且 $S_6>S_7>S_5$, 给出下列五个命题: \\textcircled{1} $d<0$; \\textcircled{2} $S_{11}>0$; \\textcircled{3} $S_{12}>0$; \\textcircled{4} 数列 $\\{S_n\\}$ 中的最大项为 $S_{11}$; \\textcircled{5} $|a_6|>|a_7|$, 其中正确命题的个数为\\blank{50}.",
"objs": [],
"tags": [],
"genre": "填空题",
"ans": "",
"solution": "",
"duration": -1,
"usages": [],
"origin": "自拟题目",
"edit": [
"20240125\t毛培菁"
],
"same": [],
"related": [],
"remark": "",
"space": "",
"unrelated": []
},
"024089": {
"id": "024089",
"content": "已知数列 $\\{a_n\\}$ 的前 $n$ 项和为 $S_n$, 若 $a_1=1$, $a_n+a_{n+1}=2 n+1$($n \\in \\mathbf{N}$, $n \\geq 1$), 则 $S_{21}$ 的值为\\blank{50}.",
"objs": [],
"tags": [],
"genre": "填空题",
"ans": "",
"solution": "",
"duration": -1,
"usages": [],
"origin": "自拟题目",
"edit": [
"20240125\t毛培菁"
],
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"related": [],
"remark": "",
"space": "",
"unrelated": []
},
"024090": {
"id": "024090",
"content": "记 $S_n$ 为等差数列 $\\{a_n\\}$ 的前 $n$ 项和. 已知 $S_9=-a_5$.\\\\\n(1) 若 $a_3=4$, 求 $\\{a_n\\}$ 的通项公式;\\\\\n(2) 若 $a_1>0$, 求使得 $S_n\\geq a_n$ 的 $n$ 的取值范围.",
"objs": [],
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"genre": "解答题",
"ans": "",
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"duration": -1,
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"origin": "自拟题目",
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"20240125\t毛培菁"
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"remark": "",
"space": "4em",
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},
"030001": { "030001": {
"id": "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.", "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.",