keepyourheadup

已知二次函数 y=x²-(m²+8)x+2(m²+6).（1）求证：不论m取任何实数,此函数图像都与x轴有两个交点,且两个交点都在x轴的正半轴上.（2）设这个函数的图像与x轴交于B,C两点,与y轴交于A点, Please remember ,______(careful) you are,____(few)mistakes upi will make mistakes的中文是什么 .Remember this,children.______junk food you eat,______you’ll feel.A.the fewer; the more healthy B.the fewer; the healthierC.the less; the healthier D.the less; the more healthily 请问m³/sec这个单位是什么意思? 第二步的sec^2(x^3)怎么消的啊 What have been the main effects of technological development on society 哪位能帮我换一种方式说```就是意思相同但是句型不同~谢谢了```当然要优美一点的,不要太过简单的,我也会``KEVIN``我句中的是EFFECTS。名 七下第二单元综合提优测评卷 13.-Remember this,John __carefull you are.-Remember this,John __carefull you are.__mistakes you will makes.-Thanks,Miss Rose.A.The more；the least B.The more；thefewer C.The less；the fewer D.The more；the Thanks allabout.Let me remember I have been to this world Thanks for you instead me made this decision 某校200米跑道的内两圈,弯道为半圆形,跑道宽1.2米.两名运动员沿各自跑道赛跑一圈,为使两人所跑距离相等,应让外跑道的运动员的起跑点前移多少米? 已知函数f(x)=1/lg(2^x+4*2^-x-a)的定义域为R,求实数a的范围 ________ it is to have a cold drink on such a hot day!A.What a fun B.How fun C.What fun D.How a fun It is _____ to have a cold drink in a very hot day.A.pleasure B.pleased C.a pleasure D.pleasures I want to t---- to Shanghai this winter该怎么填 When do you want go to America?I want to go to America this Sunday.为什么问就是want,回答就是want to呢? 求一根弹簧钢丝实际长度：螺旋呈3个圆周,带螺旋长度2cm,螺旋高度0.5cm.有关于求螺旋长度的公式吗?阿基米德螺旋线是怎么回事?适用此题吗? f(x)=绝对值（x-a),g(x)=ax,记F(x)=f(x)-g(x),求函数F(x)在(0,a]上的最小值F(x)=f(x)-g(x)=｜x-a｜-ax 因为定义域为：（0,a] 所以 0 设函数f{x}=|x-a|,g{x}=ax.记F{x}=f{x}-g{x},求函数F{x}在{0,a]上的最小值{a>0} 已知函数fx=|x-a|,g(x)=ax.记F(x)=f(x)-g(x),求函数F(x)在(0,a]上的最小值(a>0)1 英语阅读理解开头是Farmers can produce more by planting several different crops in the same field...英语阅读理解开头是Farmers can produce more by planting several different crops in the same field ,要经典试题答案 函数F（x）是绝对值x减a…G（X）是a乘x,记w等于F减G求：W在（0,a]上的最小值（a大于0） is four times more likely to have heart disease than a non-smoker of the same age英文翻译 什么意思? One of the (secret)of (learn)more english 把一张长6分米,宽4分米的红纸剪成一个最大的圆,剪掉部分的面积是（ ）平方分米. 把一张长为6dm宽为4dm的纸剪成一个最大的圆剪掉部分的面积是多少平方分米 1.900000-9=________×99999 2.解1/3（12-X)+2X=12-X （写出过程） 解1/3（12-X)+2X=12-X 900000-9=________×99999 （写出过程）1.900000-9=________×999992.解1/3（12-X)+2X=12-X 1\2x+（30+x）*1\3=13「解这个方程, the size and shape of your ears作主语谓语动词用什么 Have you the size and shape of your ears before?A.seen B.noticed C.heard D.watched let me show____(your)the TV show中间填什么? the best weight for you is one that is right for your shape and size