录入24届赋能补充题至3B

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weiye.wang 2024-01-04 22:22:53 +08:00
parent 68f2fe2d22
commit 8c781bd33b
1 changed files with 80 additions and 0 deletions

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@ -616831,6 +616831,86 @@
"space": "",
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"023011": {
"id": "023011",
"content": "不等式 $2^{x^2-5}>\\dfrac{1}{2}$ 的解集为\\blank{50}.",
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"tags": [],
"genre": "填空题",
"ans": "",
"solution": "",
"duration": -1,
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"origin": "24届赋能补充题目",
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"20240104\t毛培菁"
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"023012": {
"id": "023012",
"content": "在 $(1+2 x)^5$ 的二项展开式中, $x^2$ 的系数为\\blank{50}.",
"objs": [],
"tags": [],
"genre": "填空题",
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"023013": {
"id": "023013",
"content": "设 $a, b \\in \\mathbf{R}$, 则``$a>b$''是``$(\\dfrac{a+b}{2})^2>a b$''的\\bracket{20}条件.\n\\fourch{充分而不必要}{必要而不充分}{充要}{既不充分又不必要}",
"objs": [],
"tags": [],
"genre": "选择题",
"ans": "",
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"duration": -1,
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"023014": {
"id": "023014",
"content": "已知函数 $f(x)=2 \\sin \\dfrac{\\pi}{2}x$. 若对任意实数 $x$, 都有 $f(x_1) \\leq f(x) \\leq f(x_2)$,则 $|x_2-x_1|$ 的最小值是\\bracket{20}.\n\\fourch{$\\pi$}{$2 \\pi$}{$2$}{$4$}",
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"genre": "选择题",
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"duration": -1,
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"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.",