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若2a+7与1-a是互为相反数,则关於X的方程4-2a=3X-1的解是?紧急通告~ 若A、B互为相反数,则关于x的方程3x+2a=x-2b的解是多少?（求x） ab互为相反数,则关于x的方程3x＋2a=x－2b的解为 (x+5.2)乘0.27=8.1 这个方程怎么解? 3x-4y-z=0 2x+y-8z=0,求x:y:z把z看成常数,分别用z表示x和y.3x+4y=-5,化为y=kx+b，求k和b 2X+4Y+8Z=100 有多少种可能? 已知3x-4y-z=0,2x+y-8z=0,且z≠0,则x：y：z=（ ） 求解2x≥x+y+z 4y≥x+y+Z 8z≥x+y+z x、y、z均大于0请问有没有解 英语翻译In England,people often talk about the weather because they can experience four seasons in one day.In the morning the weather is warm just like in spring.An hour later black clouds come and then it rains hard.The weather gets a little col x+y=32,2x+4y=100 (x+y)/2=(y+z)/2=(z+x)/2,且2X+4Y+6Z=100问 X Y Z 是多少 要算式 判断函数f(x)=1/(2^x-1)+1/2的奇偶性 判断函数f(x)=[(a^x) -1] / [(a^x)+1](a〉0,a≠1)的奇偶性,说明理由 已知a,b是非零向量、f(x)=Y （1）若a垂直于b、判断函数f(x)的奇偶性；已知a,b是非零向量、f(x)=Y（1）若a垂直于b、判断函数f(x)的奇偶性；（2）若f(x)为奇函数、证明：a和b垂直. 英语翻译What is your favorite holiday?Here are some students' opinions． Sandy from Taiwan says：My favorite holiday is the Mid-Autumn festival．I always visit my grandfather and grandmother,and we always go to the same restaurant on the mount 两道金融英文题1.(Dividend adjustment model) Regional Software has made a bundle selling spreadsheetsoftware and has begun paying cash dividends.The firm’s chief financial officer would likethe firm to distribute 25% of its annual earnings (P 有5和7两个数,现在规定,将黑板上任意两个数相加的和写在黑板上.问：经过若干次操作后,黑板能否出现23这里意思是5+7=12,就可以用12了 英语翻译把下列句子翻译成英文.1.教室里有许多学生.其中一个正在擦黑板.2.听,那只猫正在厨房里喝牛奶.3.不要看着我,去把水龙头关上. 黑板上写有5和8两个数字,现规定操作:将黑板上任意两个数字的和写在黑板上,经过若干次操作后,黑板上能否出现41?为什么? 已知方程2X的平方-(2+根号3)X-M=0的一个根是1,另一个根是?快点帮帮忙啊.在线等啊````` 英语翻译We spend hours,days and years of our lives in school.Imagine you could design your dream school,what would it be like?What would you be doing?We wanted to find out what teenagers around the world thought.Here is what they said:Richard fro 英语翻译不要用百度、有道、等等各种词典,因为我已经用过了!根本就读不通.Koala produces value,in the sense thatthe “advantages” or “benefits” of its product are “sources of valuecreation”.However,creating valu 英语翻译不要用百度、有道、等等各种词典,因为我已经用过了!根本他妈得救读不通.The sequence of events is now complete.It begins with the identificationof drivers’ unmet need – a tension and an opportunity –to whi 受到挫折放弃的反面例子 要准确今天之内!要超详细! 最好是名人! 挫折的反面事例 遇到挫折的反面的例子 名人勇敢面对困难的事例 已知函数f(x)=3sin(2x+兀/3),x∈R.求函数f(x)的最大值和最小值,并求取最大值和最小值时自变量x的值? 已知函数f(x)=-3sin^2x-4cosx+2 (1)求f(派/3）的值 （2）求f(x)的最大值和最小值 英语翻译1、 我记得昨天我还提醒你方糖别放太多!2.麻烦你们送来一个包囊3,我不想离开你 （这句尽量书面化.）4.只是想给你惊喜~ 外国人经历磨难最终成功的事例一个古代的一个现代的,越快越好 经历磨难成才的例子具体的事例