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發表於:2021-02-14
問題詳情:函式f(x)的圖象向右平移1個單位長度,所得圖象與曲線y=ex關於y軸對稱,則f(x)=()A.ex+1 B.ex-1C.e-x+1 ...
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發表於:2019-06-09
問題詳情:設火箭發*失敗的概率為0.01,若發*10次,其中失敗的次數為X,則下列結論正確的是()A.E(X)=0.01B.P(X=k)=0.01k×0.9910-kC.D(X)=0.1D.P(X=k)=C×0.01k×0.9910-k【回答】D知識點:概率題型:選擇題...
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發表於:2016-11-01
incameraorexparteproceedings人紅遭忌,小心暗器....笑的理由不多,但似乎還是擁有笑的能力。Theprohibitionsonexpartecontactscomeintoplaywhenaproceedinghasbeennoticedforhearing,un...
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發表於:2020-03-09
問題詳情:*命題“f(x)=ex+在(0,+∞)上是增函式”,一個同學給出的*法如下:∵f(x)=ex+,∴f′(x)=ex-.∵x>0,∴ex>1,0<<1,∴ex->0,即f′(x)>0,∴f(x)在(0,+∞)上是增函式.他使用的*方法是()A.綜合法 ...
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發表於:2017-09-18
"出廠價格,見exfactoryprice"Icanalsoconfirmthatbasedonquantitiesof20,000unitsormorethatapriceof5.50POUNDSexfactoryisavailablelessanextra10%discountforpaymentwithyourpurc...
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發表於:2020-01-01
問題詳情:—Thereisgoingtobeaconcertthisevening. — excitingnews! an an【回答】B知識點:感嘆句題型:選擇題...
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發表於:2021-01-07
問題詳情:函式y=-ex的圖象()A.與y=ex的圖象關於y軸對稱B.與y=ex的圖象關於座標原點對稱C.與y=e-x的圖象關於y軸對稱D.與y=e-x的圖象關於座標原點對稱【回答】D知識點:基本初等函式I題型:選擇題...
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發表於:2020-12-20
問題詳情:已知命題p:“∃x∈R,ex﹣x﹣1≤0”,則命題¬p()A.∀x∈R,ex﹣x﹣1>0 B.∀x∉R,ex﹣x﹣1>0C.∀x∈R,ex﹣x﹣1≥0 D.∃x∈R,ex﹣x﹣1>0【回答】A知識點:常用邏輯用語題型:選擇題...
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發表於:2020-03-21
問題詳情:已知函式f(x)=(x+a)ln(x+a),g(x)=﹣+ax.(1)函式h(x)=f(ex﹣a)+g'(ex),x∈,求函式h(x)的最小值;(2)對任意x∈上h'(x)≥0,h(x)遞增,h(x)的最小值為.【回答】②當﹣1<a﹣1<1即0<a<2時,在x∈上h'(x)≤0,h(x)為減函式,在在x∈上h'(x)≥0...
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發表於:2021-07-17
問題詳情:已知f(x)=ex-e-x,g(x)=ex+e-x(e=2.71828…)(1)求[f(x)]2-[g(x)]2的值;(2)若f(x)f(y)=4,g(x)g(y)=8,求的值.【回答】解析(1)[f(x)]2-[g(x)]2=(ex-e-x)2-(ex+e-x)2=(e2x-2+e-2x)-(e2x+2+e-2x)=-4.(2)f(x)f(y)=(ex-e...
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發表於:2018-07-31
Letusconsidertheexante,inadvanceofthethinkingandplan.Ingeneraljurisprudence,wemightassociatetheexanteperspectivewithlegalinstrumentalism(orlegalrealism).Inresponsetothis,...
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發表於:2020-09-30
問題詳情:命題“∀x∈R,ex>0”的否定是 .【回答】 ∃x∈R,ex≤0. 知識點:常用邏輯用語題型:填空題...
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發表於:2019-08-06
問題詳情: Weallfeltvery atthe news.A.exciting;excited B.excited;excitingC.exciting;exciting D.excited;excited【回答】B知識點:相似...
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發表於:2021-10-09
問題詳情:Thematchwas andIfelt . ting; excited ted; exciting ted; excited...
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發表於:2021-07-12
問題詳情:Theconceptofsolitude(獨處)inthedigitalworldisalmostnon-existent.Intheworldofdigitaltechnology,e-mail,socialnetworkingandonlinevideogames,informationismeanttobe__2...
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發表於:2019-10-06
問題詳情:Sleepinginisoneofthebestpartsoftheweekend.Afteralong,exhaustingworkweek,sometimesallyouwanttodoissleep.OnFridaynight,youslideunderthecovers,smilinginanticipation....
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發表於:2019-04-03
問題詳情:已知f(x)=ex-e-x,g(x)=ex+e-x(e=2.718…).(1)則[f(x)]2-[g(x)]2的值為; (2)若f(x)·f(y)=4,g(x)·g(y)=8,則=. 【回答】(1)-4(2)3(1)[f(x)]2-[g(x)]2=[f(x)+g(x)][f(x)-g(x)...
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發表於:2019-12-23
問題詳情:設函式f(x)在(0,+∞)內可導,且f(ex)=x+ex,則f'(1)=.【回答】 2【解析】令ex=t,則x=lnt,t>0,所以f(x)=lnx+x,x>0,所以f'(x)=1+,則f'(1)=1+1=2.知識點:基本初等函式I題型:填空題...
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發表於:2019-12-23
問題詳情:函式y=(ex+e-x)的導數是()A.(ex-e-x) B.(ex+e-x)C.ex-e-x D.ex+e-x【回答】A[y′=(ex+e-x)′=(ex-e...
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發表於:2017-04-21
Brazilianmediasaidtheboy'sex-stepfatherwasdetained.Couldthiscraftyex-paratrooperpulloffanotherupset?Iguessedthathewasanex-serviceman.Afteradivorcetheex-husbandusuallyget...
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發表於:2024-02-23
1、presentatthemeetingexofficio2、TheOfficeofaContractingPartyshallcorrectitsownmistakes,exofficiooruponrequest,fornofee.3、Sixofthe12membersrepresentemployers,andtheothe...
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發表於:2024-01-07
1、Visualizationofσ_1receptorsineyesbyinvivopositronemissiontomographyandexvivoautoradiography2、Realtimeexvivodetectionanddynamicmonitoringofinvivoexpressionofsecretedl...
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發表於:2021-09-05
問題詳情:命題:∀x∈R,ln(ex﹣1)<0的否定是()A.∀x∈R,ln(ex﹣1)>0 B.∀x∈R,ln(ex﹣1)≥0C.∃x∈R,ln(ex﹣1)<0 D.∃x∈R,ln(ex﹣1)≥0【回答】 D【考點】命題的否定.【分析】根據全稱命題的否定是特稱...
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發表於:2021-12-27
問題詳情:下列說法正確的是()A.“∀x∈R,ex>0”的否定是“∃x∈R,使ex>0”B.若x+y≠3(x,y∈R),則x≠2或y≠1C.“x2+2x≥ax(1≤x≤2)恆成立”等價於“(x2+2x)min≥(ax)max(1≤x≤2)”D.“若a=﹣1,則函式f(x)=ax2+2x﹣1...
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發表於:2019-10-31
問題詳情: 設函式f(x)在(0,+∞)內可導,且f(ex)=x+ex,則f′(1)=___________.【回答】2【解析】設ex=t,則x=lnt(t>0),∴f(t)=lnt+t,∴f′(t)=+1,∴f′(1)=2.知識點:導數及其應用題型:填空題...