數軸上表示數a點向右平移9個組織長度後得到它的相反數

數軸上表示數a點向右平移9個組織長度後得到它的相反數

x+9=-x
2x=-9
x=-4.5
A點表示的數是-4.5
a+a+9=0
2a=-9
a=-4.5
英語翻譯
rt
出處：
“I call myself 'reluctant'，”she says，“not because I think I'm owed a job，or would rather be travelling the world or kicking back with a cup of tea，but because I've been raised and educated to aspire to be a good employee.”
Per online Merriam-Webster Dictionary:
kick back
intransitive verb
Definition of KICK BACK
：to assume a relaxed position or attitude；also：to spend time relaxing：take it easy
kicking back with a cup of tea -拿著杯茶輕鬆一下，或輕鬆的享用一杯茶.
kick back[踢回；復發；退還；突然反沖；
但這裡是引申義，kicking back with a cup of tea是享受一杯茶
函數f（x）=x3+sinx+1（x∈R），若f（a）=3，則f（-a）的值為（）
A. 3B. 0C. -1D. -2
∵f（a）=3，∴2sina+a3+1=3∴2sina+a3=2∴f（-a）=-2sina-a3+1=-（2sina+a3）+1=-2+1=-1故選C
已知函數f（x）=sin2x-2sinx^2（1）求函數f（x）的最小正週期（2）求函數f（x）的最大值及f（x）取最大值時x的集合
（1）f（x）=sin2x-1+cos2x=√2sin（2x+π/4）-1
最小正週期T=2π/2=π
（2）f（x）=√2sin（2x+π/4）-1最大值為√2-1
此時2x+π/4=2kπ+π/2
x=kπ+π/8（k∈Z）
數軸上表示-1.5的點向左平移2/3個組織長度得到C，向右平移2/3個組織得到D，則C、D表示的數分別是幾？列式
C點表示的數是：-1.5+（-2/3）=-3/2-2/3=-13/6
D點表示的數是；-1.5+2/3=-3/2+2/3=-5/6
則C，D表示的數分別是-13/6；-5/6.
C點表示的數是：-1.5+（-2/3）=-3/2-2/3=-13/6
D點表示的數是；-1.5+2/3=-3/2+2/3=-5/6
則C，D表示的數分別是-13/6；-5/6
I ___a cup of tea.
A.want to B.want C.like to D.couid like
答案：I【want】a cup of tea.
翻譯；我想要一杯茶.
解析；sb want sth.翻譯為某人要某物.
【親！你的10分滿意，我們團隊的無限動力】
I want a cup of tea.追問：完整
函數f（x）=lg [（kx-1）/（x-1）]，k>0.如果f（x）在[10，+∞]上單調遞增，求k的取值範圍
lgu當u>0時單增，由題意，
當x∈[10，+∞）時，g（x）=（kx-1）/（x-1）>0，且單增.
（kx-1）/（x-1）= k +（k-1）/（x-1）單增=>（k-1）< 0 => 0（kx-1）> 0 => K > 1/10
於是，1/10 < k < 1 .
（1）由題意得，kx-1／x-1＞0，即（x-1）（kx-1）＞0，
∵k＞0，∴應分三種情况求
當0＜k＜1時，定義域為（-∞，1）∪（1 k，+∞），
當k=1時，定義域為（-∞，1）∪（1，+∞）
當k＞1時，定義域為（-∞，1 k）∪（1，+∞）；
（2）令y=kx-1／x-1 =k+ k-1／x-1，
∵函數y=lgx在定義域…展開
（1）由題意得，kx-1／x-1＞0，即（x-1）（kx-1）＞0，
∵k＞0，∴應分三種情况求
當0＜k＜1時，定義域為（-∞，1）∪（1 k，+∞），
當k=1時，定義域為（-∞，1）∪（1，+∞）
當k＞1時，定義域為（-∞，1 k）∪（1，+∞）；
（2）令y=kx-1／x-1 =k+ k-1／x-1，
∵函數y=lgx在定義域上單調遞增，且f（x）在[10，+∞）上單調遞增，
∴函數y=kx-1／x-1在[10，+∞）上單調遞增，∴k-1＜0，解得k＜1，
∵當0＜k＜1時，函數的定義域是（-∞，1）∪（1 k，+∞），
∴1／k＜10，即k＞1／10，
∴k∈（1／10，1）.收起
函數y=cos2x-8cosx的值域是______.
y=cos2x-8cosx=2cos2x-8cosx-1=2（cosx-2）2-9，由於cosx∈[-1，1]，而當cosx＜2時，y為减函數，所以當cosx=1時，y的最小值為2×（1-2）2-9=-7；當cosx=-1時，y的最大值為2×（-1-2）2-9=9.所以函數y的值域是[-7，9].故答案為：[-7，9]
已知A，B兩點在數軸上，A點表示數為-10，OB=30A，點M以每秒3個組織長度的速度從點A向右運動，（點M，點N同時出發）
（1）寫出數軸上點B對應的數是（）
（2）經過幾秒，點m，n分別到原點0的距離相等
（3）當點m運動到什麼位置時，恰好使AM=2BM
各位好心的大哥哥姐姐，這是中山區期末考試的一道題
（1）B對應的數是（300）（2）由於沒有給出N的起點和速度，故無法解答.猜測原題是點M以每秒3個組織長度的速度從點A向右運動，點N以每秒？個組織長度的速度從點B向左運動，經過幾秒，點m，n分別到原點0的距離相等？O（∩_∩）O…
英語作文短語
高中英語作文常用句型，越多越好，不怕複製，越多越好，要經典的，還有高中語文問答題答題模式！求給力啊，特別是英語的，
一、根據銜接詞本身在文章中起到的作用，主要分為以下四類，即“起”、“承”、“轉”、“合”.
（一）表示“起”的詞/片語：用於開篇引出擴展句.
at first最初for one thing…（for another）
at present現在；當今首先…（其次）…
currently現時；最後recently最近
first（ly）第一in general一般說來
in the beginning起初one the one hand…（on the other hand）
to begin with首先；第一一方面…（另一方面）
first of all首先；第一generally speaking一般地說
in the first place首先；第一on the whole總起來說
lately最近to start with首先；第一
presently現在；此刻now現在
（二）有關“承”的常用詞語：用來承接上文.
after/after that/afterwards此後by this time此時
after a few days幾天以後certainly無疑地；當然地
after a while過了一會兒therefore囙此；結果
also/too並且；又for example例如
at the same time同時for instance例如
beside此外for this purpose為了這個目的
Besides/what，s more而且；此外from now on從此
in addition此外second第二；第二點
in addition to…除…之外secondly第二
in fact事實上similarly同樣地
in other words換句話說so所以
in particular特別（地）soon不久
in the same way同樣地still仍然
by the way順便提一句then然後
indeed的確third第三；第三點
meanwhile與此同時thirdly第三
moreover而且，此外for another其次
no doubt無疑地such as正如
obviously明顯地later後來
of course當然truly事實上；真實地
particularly特別地unlike…不像……；和……不同
what is more而且；此外
（三）有關“轉”的常用詞語：用來表示不同或相反的意見.
after all畢竟fortunately幸運地
all the same依然；照樣however然而；無論如何
anyway無論如何in spite of儘管……；雖然……
at the same time同時；然而luckily幸運地
but但是by this time此時
though/although儘管no doubt無疑地
in/by contrast對比之下on the contrary相反地
even though即使otherwise否則
still仍然unfortunately不幸地
in fact事實上unlike不像……；和……不同
as a matter of fact事實上yet仍；然而；但是
especially特別地
（四）有關“合”的常用詞語：用於小結上文或結束本段落的內容.
above all最重要的是accordingly於是
as a result結果in sum總之，簡而言之
as has been noted如前所述in summary簡要地說
as I have said如我所述on the whole總體來說；整個看來
at last最後therefore囙此
by and large一般說來thus囙此
briefly簡單扼要地to speak frankly坦白地說
by doing so如此to sum up總而言之
eventually最後surely無疑
finally最後to conclude總而言之
in brief簡言之no doubt毫無疑問
in conclusion總之，最後undoubtedly無疑
in short簡而言之truly的確
in a word總之so所以
certainly當然地；無疑地obviously顯然
all in all總之
二、根據銜接詞本身的意思和文章連接所需要的邏輯意義，可分為以下14類.
（一）表示因果關係
as a result
He never studied hard，and as a result he failed in the last examination.
as a result of
He is late for work as a result of traffic accident.
accordingly
He wanted to buy a radio for study English，and accordingly her mother bought it for him.
because（of）
We are delayed because of a traffic jam.
due to
His success is due to his excellent work.
owing to
Owing to his absence，our meeting is not held.
thanks to
Thanks to a good teacher，she passed the examination.
now that
Now that you have grown up，you must earn for yourself.
so long as
You could realize your dream so long as you try it again and again.
since
Since you are here now，you，d better give a hand.
in that
The policy is harmful in that it may encourage people to give up.
so that
The office speaks at the top of his voice so that every soldier could hear him.
therefore
There is a calculating mistakes there，therefore，the answer is wrong.
（二）表示解釋關係
as a matter of fact
I will go there this morning，as a matter of fact，I am only 10 minutes，drive from you.
as well
I will go there. My friend will go with me as well.
frankly speaking
Frankly speaking，I am not very satisfactory with your words.
in this case
In this case，I will go there as soon as possible.
（三）表示推理關係
or else
Hurry up，or else you，ll be late.
otherwise
You must carry this passport，otherwise you will be stopped by the guard.
if so
If so，it will make a great difference.
（四）表示遞進關係
in addition
I need your help. In addition，I also need her support.
besides
First，we must work hard. Besides，we must work with a creative mind.
and moreover
The hat is the right size for you，and moreover，it goes well with your skin.
that is to say
The stock price is declining，that is to say，I am losing money.
in ot