命题p:实数x满足x^2-4ax+3a^2

I would finally knock on his door and say politely
'PLease Sir,I am very sorry to disturb you however,would it be alright if you can just turn down your music a bit?
'I asked you many times to turn down your music volumne but maybe you weren't in the mood so I am asking you politely Sir...please turn down your music..'
If he says something like 'Bugger off..bite me'
I will simply write a little note:
Dear Sir
I do like to repeat.Please turn off your music..It is too loud..Please think for others..If you won't turn off the music then I am sorry but I have to complain..
If he still don't give a damn..I'll..I'll burst into his room and bash the hell out of him...tempting but I can't so...I guess that I'll complain and when he is asleep..I'll also play loud music to bug him..
hehe..楼楼你..坏...

p是q的既不充分也不必要条件,说明pq不能互推.
p等价于x处于1-a与1+a之间
q等价于00
解得1

命题p:存在x属于R,x^2+1/x^2

求出p和q分别为
p：1

若命题“P且q”是真命题,则p为真且q为真
p为真：设t=2^x.因为x∈[1,2],所以t∈[2,4] 即为 1+t+a*t^20,开口向上,对称轴t=-1/(2a)

任意x>0,x^2-sinx>0

x^2+mx+n=o有两个小于1的正根,设两根为X1,X2,且0

1.　┑P:∀x∈R+,log(2)x≠1．　注：2是底数．
2.f(x)=ln[ex/(e-x)]
f(e-x)=ln[e(e-x)/x]
f(e)+f(e-x)=ln{[ex/(e-x)]·[e(e-x)/x]}=lne²=2
所以　f(e/2013) +f(2e/2013)+...+f(2012e/2013)
= [f(e/2013)+f(2012e/2013]+[f(2e/2013)+f(2011e/2013]+...+[f(1006e/2013)+f(1007e/2013]
=1006×2=2012
从而　2012=503(a+b),a+b=4
由基本不等式,(a²+b²)/2≥[(a+b)/2]²=4,选B
3.画图易知,当y=kx与f(x)=|sinx|切于x∈(π,2π)时,有且只有三个公共点．
设切点为(α,|sinα|),即(α,-sinα）,
当　x∈(π,2π)时,f(x)=|sinx|=-sinx,f'(x)=-cosx,所以　k=f'(α)=-cosα,
从而　切线为　y+sinα=-cosα·(x-α),
于是由切线过原点,得α=sinα/cosα=tanα,选　D　

p 集合为 -2

如果两个数分别是2和3,那么3>2

由于命题p:| x – 2 | < a (a > 0 ),命题q：| x^2 – 4 | < 1 ,若p是q的充分不必要条件,
所以p可以推出q 也就是p中x的解集是q中x解集的真子集
| x – 2 | < a 解得 -a 2

1、可以用你回忆的主要事例.如：《打雪仗》、《“巫婆捣药”》等等.
2、直接用《我的童年》《回忆童年》《童年往事》等等命题.概括文章所写的,都是童年的事情.
3、悬念.如《白日梦的秘密》《秘密基地里的谈话》等等,不作明确的说明,勾起读者的好奇.（我比较推荐这个,我都是这样命题的）
4、用《一次难忘的经历》、《第一次乘公车》等命题,也是总体概括文章内容的,以这“一次”、“第一次”等为主要内容,写一件事.
5、用话语命题.如《啊哟,什么东西?!》、《你真是我的偶像》等等.题目不能过长,注意!
6、以我学会了什么东西为题,如《我学会了烧饭》、《我学会了骑自行车》等等.
7、以一句成语或一句名言概括文章.如《成功是失败之母》、《骑乐无穷（写骑自行车的）》等等.
以上是我自己总结出来的经验,希望你满意.

非p是非q的必要不充分条件,说明:
q是P的必要不充分条件,那么
p是q的充分不必要条件.
命题p:实数x满足x^2-4ax+3a^2

建议以后还是把题目发上来,否则像你现在这样提问是不可能得到解答的.

As you slowly open your eyes,
look around ,notice where the lightcomes into your room;
listen carefully,see if there are new sounds youcan recognize;
feel with your body and spirit,and see if you can sensethe freshness in the air.
Yes,yes,yes,it's a new day,it's a different day,and it's a bright day!
And most importantly,it is a new beginning for your life,
a beginning where you are going to make new desicisions,
take new actions,make new friends,
and take your life to a totally unprecedented level!
In your mind's eye,you can see clearly the things you want to have,
the paces you intend to go,the relationships you desire to develop,
andthe positions you aspire to reach.
You can hear your laughters of joy and happiness on the day when
everything happens as you dream.
You can see the smiles on the people around you when the magic moment strikes.
You can feel your face is getting red,your heart is beating fast,
and your blood is rushing all over your body,to every single corner of your being!
You know all this is real as long as you are confident,passionate and committed!And you are confident,you are passionate,you are committed!
You will no longer fear making new sounds,showing new facial expressions,
using your body in new ways,approaching new people,and asking new questions.
You will live every single day of your life with absolute passion,
andyou will show your passion through the words you speak and the actions you take.
You will focus all your time and effort on the most important goals of
your life.You will never succumb to challenges of hardships.
You will never waver in your pursuit of excellence.
After all,you arethe best,and you deserve the best!
As your coach and friend,
I can assure you the door to all the best things in the world will open to you,
but the key to that door is in your hand.
You must do your part,you must faithfully follow the plans you make
and take the actions you plan,you must never quit,you must never fear.
I know you must do it,you can do it,you will do it,and you will succeed!
Now stand firm and tall,make a fist,get excited,and yell it out:
I must do it!I can do it!I will do it!I will succeed!
I must do it!I can do it!I will do it!I will succeed!
I must do it!I can do it!I will do it!I will succeed!

高中数学 四种命题课件二 新人教A版选修1-1_百度文库 http://wenku.baidu.com/view/98a6bbeb102de2bd9605889e.html

1≤m＜2

firstly,there is an old saying :opportunities are always left for someone who has made a good preparation.so no matter what happens ,we should always exercise ourselves before it's too late.
Secondly ,try your best to know more about the job you want to got.
because if you know more ,you will gain boss's believe and the boss will think you are more interested in the job than others.
thirdly,have a good appearance.keeping smile and confident is also very important ,because good performance will give every boss a good impression.

Should we give more attention to students health or grades...
A veteran educator,said students now are mostly only-child,they face further education,employment as well as the resultant family,social and other pressures,led to the emergence of psychological problems.Faced with these problems,our teachers in the concepts,methods and means if they can not advance with the times,is still based on assumptions,the present belongs to psychological problems,the thinking into quality problems,often antagonistic students,teachers confused.
They have suggested that the education administration departments,schools and teachers should pay more attention to physical and mental health of students,and strengthen the monitoring of physical and mental health of students and to take effective measures to reduce the academic burden on students,students of physical exercise and good health habits,for their healthy growth and loose to create a favorable environment.Schools,families and community to further strengthen the mental health of students and education,especially in schools to set up relevant institutions,with full-time psychological counseling teachers,the creation of mental health programs,conduct regular mental health and advisory activities.

若p且q为真,则p为真,q为真
解方程
1.x^2+M0
解得-√(-m)

f(x)=cos2x-2根号3sinxcosx=2cos(2x+π/3)周期T=π ①对X在区间[-π/6,π/3,则2x+π/3属于[0,π]减函数X对应点(π/12,0),则2x+π/3对应点（π/2,π/3）非中心对点向左平移5π/6个单位得：f(x)=2cos[2(x+5π/6)+π/3]...

命题p:x-5/x

-2
由方程组
ax+by+c=0
x^2+y^2=4
得
(a^2+b^2)x^2 + 2acx + c^2-4b^2 = 0.(1)
(a^2+b^2)y^2 + 2bcy + c^2-4a^2 = 0.(2)
设x1,x2是(1)的两根,y1,y2是(2)的两根,则
向量OA·向量OB = x1*x2 + y1*y2
=(c^2-4b^2)/(a^2+b^2)+(c^2-4a^2)/(a^2+b^2)
=(2c^2-4(a^2+b^2))/(a^2+b^2)
将a^2+b^2=c^2代入得
向量OA·向量OB = -2.

由题意可知,只要有x使得x^2+ax+1

I have the chance to experience the living in both the city and the country.For me,I would prefer living in the country.
First,the living environment in the country is fresh and beautiful.I spent my childhood in the country.In the morning,we used to get up early and go to shcool.On the way to school I enjoyed a lot on the fresh air and the nice songs by the birds.The breeze and the beautiful scenery has left deep impression to me until now.
Second,the people in the country is nice and pure.Though not all of them are well-educated,my family can always get the help from the neighbours on time.While in the city,the relationship with the neighbours is not as close as in the country.
Now I am living in the city,but I always miss the days in the country very much.I miss the fresh air,the songs of the birds,and the nice and friendly neighbours.

x^2-x-m=0无实根, 判别式=1+4m < 0, m < -1/4
m < -3是m < -1/4的一部分(子集), p成立时,q一定成立, p是q的充分条件.
m < -1/4时, 不一定m < -3 (如m = -1), p不是q的必要条件.

首先解出p：-2≤x≤10；q：1-m≤x≤1+m.q是p的必要不充分条件,则q能推出p,p却不能推出q（决定不能有等号）,即q的范围大于p的范围,即1-m＜-2；1+m＞10,得出m＞3和m＞9,取交集得m＞9.

p:存在量词x属于R,x^2+M

BD平分角ABC 角ABD=角DBC=55 角ABC=110
角BCD=70 角BCD+角ABC=180
所以 AB//CD

如果在[-1,1]上有两个解,f（-1）f（1）就大于0了

解 P 命题得到 （x-a)(x-3a)

你要写出你是高中还是初中,因为都有2010-2011界.
不过作文无非就是议论文,叙述文等几种问题,你完全不用担心.
最多平时多写,多看,多背.

命题非P x≤-2 或x≥10
非q x≤1-m或x≥1+m
必要不充分就是 非q可推出非p 非p推不出非q
所以1+m＞10 或 1-m＜-2 取交集

命题q
A={x|x^2+(a+2)x+1=0,x∈R}={x|（x+1）^2+ax=0,x∈R}
可得ax≤0
由于B={x|x>0},且A∩B=Φ
因此a≥0
p:-5

第一个命题要证明的话 直接把后面的2个代入前面的等式中,换算一下就知道了 第二个命题貌似要更具奇函数的性质来证明 具体的偶忘了- -!貌似这题很简单的哦,自己多动脑,别人做出来也是别人的,下次你还是不会