收录高三寒假作业30新题

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wangweiye7840 2024-01-25 11:39:39 +08:00
parent 19d3b8a6ab
commit dd98b8891b
2 changed files with 216 additions and 7 deletions

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20240125-113548
023848:023855
20240125-113926
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"20220624\t朱敏慧, 王伟叶"
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"20220625\t王伟叶"
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"20220625\t王伟叶"
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"20220726\t王伟叶"
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"20230202\t王伟叶"
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@ -643640,6 +643652,198 @@
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"023856": {
"id": "023856",
"content": "设向量 $\\overrightarrow{a}=(3,2)$, $\\overrightarrow{b}=(1,-4)$, 则 $\\overrightarrow{b}$ 在 $\\overrightarrow{a}$ 方向上的数量投影为\\blank{50}, 投影为\\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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"023857": {
"id": "023857",
"content": "已知点 $A(8,-1)$、$B(1,-3)$, 若点 $C(2 m-1, m+2)$ 在直线 $AB$ 上, 则实数 $m=$\\blank{50}.",
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"023858": {
"id": "023858",
"content": "设向量 $\\overrightarrow{p}=(2,7)$, $\\overrightarrow{q}=(x,-3)$. 若 $\\overrightarrow{p}$ 与 $\\overrightarrow{q}$ 的夹角为钝角, 则 $x$ 的取值范围是\\blank{50}, 若 $\\overrightarrow{p}$ 与 $\\overrightarrow{q}$ 的夹角为锐角, 则 $x$ 的取值范围是\\blank{50}.",
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"genre": "填空题",
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"20240125\t毛培菁"
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"040747"
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"023859": {
"id": "023859",
"content": "已知 $|\\overrightarrow{a}|=5$, $|\\overrightarrow{b}|=8, \\overrightarrow{a}$ 与 $\\overrightarrow{b}$ 的夹角为 $60^{\\circ}$, 则 $|\\overrightarrow{a}+\\overrightarrow{b}|=$\\blank{50}.",
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"023860": {
"id": "023860",
"content": "设 $\\overrightarrow{a}=(m+1,-3)$, $\\overrightarrow{b}=(1, m-1)$, 且 $\\overrightarrow{a}+\\overrightarrow{b}$ 与 $\\overrightarrow{a}-\\overrightarrow{b}$ 垂直, 则实数 $m=$\\blank{50}.",
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"genre": "填空题",
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"023861": {
"id": "023861",
"content": "若 $|\\overrightarrow{a}|=3$, $|\\overrightarrow{b}|=4$, $(\\overrightarrow{a}+2 \\overrightarrow{b}) \\cdot(2 \\overrightarrow{a}-\\overrightarrow{b})=-32$, 则 $\\overrightarrow{a}$ 与 $\\overrightarrow{b}$ 的夹角为\\blank{50}.",
"objs": [],
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"genre": "填空题",
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"duration": -1,
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"023862": {
"id": "023862",
"content": "若将向量 $\\overrightarrow{a}=(3,4)$ 绕原点按逆时针方向旋转 $45^{\\circ}$ 得到向量 $\\overrightarrow{b}$, 则 $\\overrightarrow{b}$ 的坐标为\\blank{50}.",
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"genre": "填空题",
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"duration": -1,
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"023863": {
"id": "023863",
"content": "已知 $O$ 为坐标原点, $\\overrightarrow{OA}=(2,2)$, $\\overrightarrow{OB}=(4,1)$, 点 $P$ 在 $x$ 轴上, 则 $\\overrightarrow{AP}\\cdot \\overrightarrow{BP}$ 最小值为\\blank{50}.",
"objs": [],
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"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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"023864": {
"id": "023864",
"content": "在平面直角坐标系 $x O y$ 中, 点 $A(-1,-2)$、$B(2,3)$、$C(-2,-1)$.\\\\\n(1) 求以线段 $AB$、$AC$ 为邻边的平行四边形两条对角线的长;\\\\\n(2) 设实数 $t$ 满足 $(\\overrightarrow{AB}-t \\overrightarrow{OC}) \\cdot \\overrightarrow{OC}=0$, 求实数 $t$ 的值.",
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"genre": "解答题",
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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.",
@ -718479,7 +718683,9 @@
"20230516\t王伟叶"
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