1. |
info: 2025-04-26 01:35:43.814 RelationalEventId.CommandExecuted[20101] (Microsoft.EntityFrameworkCore.Database.Command)
9ms [Parameters=[@p7='81c10e55-346f-48bd-982b-c3864a8ea972', @p0='True', @p1='False', @p2='1', @p3='6ecd74b6-bd8e-4585-a2a9-2f8e0d84cb4c', @p4='83.jpg' (Size = 100), @p5='https://knowledgenest.blob.core.windows.net/scanners/0/[Matematika][Matematika Tau plius Išplėstinis kursas 12 klasė][Vadovėlis 1 dalis]/pages/83.jpg' (Size = 1000), @p6='## 3.4. Uždaviniai
**395.** Parašykite funkcijos y = f(x) grafiko liestinių, einančių per grafiko taškus, kuriuose x = a, lygtis.
Nubraižykite funkcijos grafiką ir liestines, kai:
a) f(x) = x² - 3, a = 1, a = -1, a = 0;
b) f(x) = -2x² + 6x, a = 0, a = 1,5, a = 3.
**396.** Parašykite funkcijos y = f(x) grafiko liestinės, einančios per grafiko tašką, kuriame x = a, lygtį, kai:
a) f(x) = x³, a = 1;
b) f(x) = 2x³ + x, a = 0;
c) f(x) = -x³ + x² - x + 4, a = -2.
**397.** Raskite dydį kampo, kurį sudaro funkcijos y = f(x) grafiko liestinė, nubrėžta per jo tašką, kuriame x = a, su teigiamąja OX ašies kryptimi, kai:
a) f(x) = x² + 1, a = 0,5;
b) f(x) = 0,5x² - 1, a = √3;
c) f(x) = 1 - x³/3, a = 1.
**398.**
1) Įrodykite, kad funkcijos y = f(x) = x² grafiko liestinė, nubrėžta per jo tašką, kuriame x = 1, yra lygiagreti su funkcijos y = g(x) = x² - 4x grafiko liestine, nubrėžta per jo tašką, kuriame x = 3.
2) Įrodykite, kad funkcijos y = f(x) = x² - x grafiko liestinės, nubrėžtos per jo taškus, kuriuose x₁ = 0 ir x₂ = 1, yra statmenos.
Tiesės y = k₁x + b₁ ir y = k₂x + b₂ yra:
* lygiagrečios, kai k₁ = k₂, b₁ ≠ b₂;
* statmenos, kai k₁ · k₂ = -1.
**399.** Senovės graikų katapultos paleistas akmuo skriejo kreive y = x - x²/100; čia y — akmens aukštis (m) virš žemės, x — akmens nuotolis (m) nuo katapultos (0 ≤ x ≤ 100).
a) Kokiu kampu akmuo buvo paleistas (t. y. kokį kampą su teigiamąja OX ašies kryptimi sudaro šios kreivės liestinė, nubrėžta per kreivės tašką, kuriame x = 0)?
b) Kokiu kampu akmuo nukrito?
**400.** Pavaizduota tiesė yra funkcijos y = f(x) grafiko liestinė, einanti per jo tašką, kuriame x = 0. Naudodamiesi brėžiniu, raskite f'(0).
**401.** Kokiame funkcijos y = f(x) = 2x² grafiko taške nubrėžta liestinė su teigiamąja OX ašies kryptimi sudaro kampą α, lygų:
a) 45°?
b) 0°?
c) 30°?
d) 60°?
e) 135°?
f) 120°?
**402.** Pavaizduotas funkcijos y = f(x) grafikas ir pažymėti trys jo taškai, kuriuose: x = x₁, x = x₂, x = x₃. Kuriame jų funkcijos išvestinės reikšmė yra didžiausia?' (Size = 4000)], CommandType='Text', CommandTimeout='30']
SET IMPLICIT_TRANSACTIONS OFF;
SET NOCOUNT ON;
UPDATE [ScannerPages] SET [Active] = @p0, [Deleted] = @p1, [Position] = @p2, [ScannerId] = @p3, [StorageMediaName] = @p4, [StorageMediaUrl] = @p5, [Text] = @p6
OUTPUT 1
WHERE [Id] = @p7;
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2. |
info: 2025-04-26 01:35:43.850 RelationalEventId.CommandExecuted[20101] (Microsoft.EntityFrameworkCore.Database.Command)
6ms [Parameters=[@__id_0='39505a67-d431-4178-f09f-ea8680026959', @__site_Id_1='63d6eb4e-8e39-4ac6-8f69-55ee76feccce'], CommandType='Text', CommandTimeout='30']
SELECT [c].[Id], [c].[Active], [c].[Deleted], [c].[Description], [c].[DescriptionBackup], [c].[Left], [c].[ParentId], [c].[Position], [c].[ProcessorGenerateImagePrompt], [c].[Right], [c].[SiteId], [c].[StorageMediaName], [c].[StorageMediaUrl], [c].[Title], [c].[TitleBackup], [c].[TitleSlug], [c].[TotalChildren], [c].[TotalScanners], [c].[TotalYoutubeVideos]
FROM [Categories] AS [c] WITH (NOLOCK)
WHERE [c].[Id] = @__id_0 AND [c].[SiteId] = @__site_Id_1 AND [c].[Active] = CAST(1 AS bit) AND [c].[Deleted] = CAST(0 AS bit)
ORDER BY [c].[Id]
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3. |
info: 2025-04-26 01:35:43.854 RelationalEventId.CommandExecuted[20101] (Microsoft.EntityFrameworkCore.Database.Command)
2ms [Parameters=[@__id_0='39505a67-d431-4178-f09f-ea8680026959', @__site_Id_1='63d6eb4e-8e39-4ac6-8f69-55ee76feccce'], CommandType='Text', CommandTimeout='30']
SELECT [c4].[Id], [c4].[Active], [c4].[Deleted], [c4].[Description], [c4].[DescriptionBackup], [c4].[Left], [c4].[ParentId], [c4].[Position], [c4].[ProcessorGenerateImagePrompt], [c4].[Right], [c4].[SiteId], [c4].[StorageMediaName], [c4].[StorageMediaUrl], [c4].[Title], [c4].[TitleBackup], [c4].[TitleSlug], [c4].[TotalChildren], [c4].[TotalScanners], [c4].[TotalYoutubeVideos], [c].[Id]
FROM [Categories] AS [c] WITH (NOLOCK)
INNER JOIN (
SELECT [c0].[Id], [c0].[Active], [c0].[Deleted], [c0].[Description], [c0].[DescriptionBackup], [c0].[Left], [c0].[ParentId], [c0].[Position], [c0].[ProcessorGenerateImagePrompt], [c0].[Right], [c0].[SiteId], [c0].[StorageMediaName], [c0].[StorageMediaUrl], [c0].[Title], [c0].[TitleBackup], [c0].[TitleSlug], [c0].[TotalChildren], [c0].[TotalScanners], [c0].[TotalYoutubeVideos]
FROM [Categories] AS [c0] WITH (NOLOCK)
WHERE [c0].[Active] = CAST(1 AS bit) AND [c0].[Deleted] = CAST(0 AS bit)
) AS [c4] ON [c].[Id] = [c4].[ParentId]
WHERE [c].[Id] = @__id_0 AND [c].[SiteId] = @__site_Id_1 AND [c].[Active] = CAST(1 AS bit) AND [c].[Deleted] = CAST(0 AS bit)
ORDER BY [c].[Id], [c4].[Position], [c4].[Id]
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4. |
info: 2025-04-26 01:35:43.863 RelationalEventId.CommandExecuted[20101] (Microsoft.EntityFrameworkCore.Database.Command)
1ms [Parameters=[@__id_0='39505a67-d431-4178-f09f-ea8680026959', @__site_Id_1='63d6eb4e-8e39-4ac6-8f69-55ee76feccce'], CommandType='Text', CommandTimeout='30']
SELECT [s5].[ScannerId], [s5].[CategoryId], [s5].[Id], [s5].[Active], [s5].[CheatSheet], [s5].[CheatSheet2], [s5].[Deleted], [s5].[FactErrors], [s5].[FactErrorsExplanation], [s5].[ParentCategory2Id], [s5].[ParentCategoryId], [s5].[ProcessorGenerateImagePrompt], [s5].[Prompt], [s5].[Reference], [s5].[ReferenceSlug], [s5].[SiteId], [s5].[SpellingErrors], [s5].[SpellingErrorsExplanation], [s5].[Summary], [s5].[Title], [s5].[TitleBackup], [s5].[TitleSlug], [s5].[TotalCards], [s5].[TotalCards2], [s5].[TotalCategories], [s5].[TotalPages], [s5].[Verified], [c].[Id]
FROM [Categories] AS [c] WITH (NOLOCK)
INNER JOIN (
SELECT [c3].[ScannerId], [c3].[CategoryId], [s1].[Id], [s1].[Active], [s1].[CheatSheet], [s1].[CheatSheet2], [s1].[Deleted], [s1].[FactErrors], [s1].[FactErrorsExplanation], [s1].[ParentCategory2Id], [s1].[ParentCategoryId], [s1].[ProcessorGenerateImagePrompt], [s1].[Prompt], [s1].[Reference], [s1].[ReferenceSlug], [s1].[SiteId], [s1].[SpellingErrors], [s1].[SpellingErrorsExplanation], [s1].[Summary], [s1].[Title], [s1].[TitleBackup], [s1].[TitleSlug], [s1].[TotalCards], [s1].[TotalCards2], [s1].[TotalCategories], [s1].[TotalPages], [s1].[Verified]
FROM [CategoryScanners] AS [c3]
INNER JOIN [Scanners] AS [s1] ON [c3].[ScannerId] = [s1].[Id]
WHERE [s1].[Active] = CAST(1 AS bit) AND [s1].[Deleted] = CAST(0 AS bit)
) AS [s5] ON [c].[Id] = [s5].[CategoryId]
WHERE [c].[Id] = @__id_0 AND [c].[SiteId] = @__site_Id_1 AND [c].[Active] = CAST(1 AS bit) AND [c].[Deleted] = CAST(0 AS bit)
ORDER BY [c].[Id], [s5].[Id], [s5].[ScannerId], [s5].[CategoryId]
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5. |
info: 2025-04-26 01:35:43.971 RelationalEventId.CommandExecuted[20101] (Microsoft.EntityFrameworkCore.Database.Command)
5ms [Parameters=[@__site_Id_0='63d6eb4e-8e39-4ac6-8f69-55ee76feccce', @__item_Left_1='2460', @__item_Right_2='2461'], CommandType='Text', CommandTimeout='30']
SELECT [c].[Id], [c].[Active], [c].[Deleted], [c].[Description], [c].[DescriptionBackup], [c].[Left], [c].[ParentId], [c].[Position], [c].[ProcessorGenerateImagePrompt], [c].[Right], [c].[SiteId], [c].[StorageMediaName], [c].[StorageMediaUrl], [c].[Title], [c].[TitleBackup], [c].[TitleSlug], [c].[TotalChildren], [c].[TotalScanners], [c].[TotalYoutubeVideos]
FROM [Categories] AS [c] WITH (NOLOCK)
WHERE [c].[SiteId] = @__site_Id_0 AND [c].[Left] <= @__item_Left_1 AND [c].[Right] >= @__item_Right_2 AND [c].[Deleted] = CAST(0 AS bit)
ORDER BY [c].[Left]
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23 ms |