您的位置: 首页 > 作业答案 > 数学 > e^(-t)sin(t/2) 求导

e^(-t)sin(t/2) 求导

分类: 作业答案 • 2022-04-24 11:43:20

问题描述：

e^(-t)sin(t/2) 求导

答

[e^(-t)sin(t/2)]'
=[e^(-t)]'sin(t/2)+e^(-t)[sin(t/2)]'
=-e^(-t)sin(t/2)+e^(-t)[1/2*cos(t/2)]
=e^(-t)[1/2*cos(t/2)-sin(t/2)]

如图,C为线段AB上一点,且AC=2BC,AC的四分之一比BC小5（1）求AC,BC的长（1）求AC,BC的长(2)点P从A点出发,以一个单位/秒的速度在线段AB上向B点运动,设运动时间为t秒（t
1.--我要去剧院看表演.--I’m going to see a play in the t( )2.--我的衣服怎么样?--What do you think of my c( ).---嗯,看上去很完美.--Well,they look p( )3.你的脚怎么了?---What‘s the matter with your f( )4.因为我的鞋是五码的.Beacause my shoes are s( ) five.
海豚靠尾部来推动下部的水，能够从水中高高跃起，被誉为“会飞的鱼”．一身长l=1.8m，质量m=65kg的海豚，跃起后从h1=1.0m的高度处*下落，尾部接触水面后经过时间t=0.25s身体速度降为零，紧接着尾部用力F向下拍打水，又向上跃起h2=0.5m，假定上升、下降两个阶段尾部与水的作用力分别都是恒力，求上升阶段尾部与水的作用力F．（取g=10m/s2）
英语选择题6个.需要回答时带解释.1.He has already spent () she gave him.A.how B.what C.which D.on what2.Write down the names of three countries.Any three will ()A.be B.do C.get D.make3.A:Do you mind getting up early?B:()A.I don't like either B.No,I don't mind it C.Yes,I don't hate it D.Yes,I like it4.The hotel () a shoe-cleaning service for its guests.A.takes B.brings C.provides D.makes5.A week's rest will () you a lot of good.A.make B.look C.do D.become6.It () unbel
请帮我解决下面的英语作业吧从B栏中找出A栏中各句的应答语.A栏（）1.How are you?（）2.Hello!Is that Paul?（）3.Where’s My sweater,Mom?（）4.Would you like to come to my birthday party?（）5.What day is it today?（）6.Happy New Year!（）7.Can I help you?（）8.Could I use your dictionary?（）9.Jack,your T—shirt is very cool.（）10.What’s the date today?B栏A.Of course.Here you are.B.It’s September 21st.C.I’m very well,thank you.D.Yes,speaking.E.The same to you.F.Yes,please.I’d like a redG.Thank
已知f（x+1）=x²-4,在递增的等差数列{an}中,a1=f（x-1）,a2=-3/2,a3=f（x）（1）求x的值；令t=x+1,则x=t-1,得f（t）=（t-1）²-4.,即f（x）=（x-1）²-4（这一步怎么得到的呢?）我是问f（x）=（x-1）²-4（这一步怎么得到的呢？）
先行词是the way,place,time,reason关系副、代词何时可省?为什么这句要加where:We've all used thermometers to measure temperature but sometimes we need to measure temperature in places WHERE you can't put a thermometer.语法说,先行词是the way,表示方式,可用that（可省）或in which来引导一个定语从句.如果先行词是时间或原因,也可用that（可省）或when或why来引导定语从句.如：（1）This was the reason that/why he was late yesterday.（2）This is the last time that I shall give you a lesson.这句是道改错题,还要加上where 是什么原因?没表达清楚，我的意思是that代替关系副词，那么我这道改错题为何还要加
英语填空为什么?用了什么语法 1,You need not(wake)_____me up.I don't have to go to work today.2,If you had listened carefully in class ,you (know)_____how to do this problem now.3,You need not (write)____such a long report,because the boss has no time to read it.
用热水器烧水,当电压为u时,用t时间就可以烧开水,如果电压高1倍,同样烧开这些水的时间为a.2t b.4t c.0.5t d.:0.25t 求详细解释为什么选D
英语作业(1),懂得就来帮忙做下单选题第1题 (2.0) 分 A、where does he live B、where he lives C、 where he does live D、he lives where 第2题 (2.0) 分 Trains can more passengers than planes.A、get B、bring C、send D、carry 第3题 (2.0) 分 You needn’t have it .You can repair it yourself.A、 repairs B、repairing C、repairing D、repaired 第4题 (2.0) 分 I have never seen beautiful coat.A、so B、such C、so a D、such a 第5题 (2.0) 分 The Great Wall more than 2000 years old.A、is B、be C、has D、 was 第6题 (2.0) 分
S=1-t+t^2求导,
为什么把东西扔入水中水会有波纹?

e^(-t)sin(t/2) 求导

相关推荐