1/2*3/9*4/2*2/3怎麼算

Jenny nearly missed the flight ______ doing too much shopping.A.as a result of B.on top of C.in front of D.in need of 已知奇函数f(x)是[-2,2]内的单调减函数,解不等式:xf(2x-1) 已知奇函数f(x)是[-2,2]内的单调减函数,解不等式xf(2x-1) 函数y=f(x)在区间(-∞,0)和(0,+∞)上是减函数,且f(2)=f(-2)=0 则不等式xf(x)>0的解集为? 是否存在整数m,使不等式mx-m＞3x+2的解集为x＜-4?若存在,请求出m的值.若不存在,请说明理由. f(x)是奇函数,在（0,正无穷）上为增函数,f(-3)=0.解不等式xf(x) The computer was used in teaching.As a result,not only___,but also students became more interested in the lessons.A.saved the teacher's energy B.was teacher's energy savedC.teacher's energy was saved D.was saved teacher's energy （ ）twice ,the Postman refused to deliver our letters unless we chained our dog.A.Being bitten B.Bitten C.Having bitten D.To be bitten 问一道英语高中题The students were walking in the street ( ).A.in twos and threes B.in two's and three's C.two and three D.in twos' and threes' 问一道英语高中的题（ ）Walk is expected to last all day,so bring ( )packed lunch .A.A;a B.The;不填 C.The;a D.A;不填 已知关于X的方程KX=4-X的解为正整数,求K所能取得的值 关于X的方程kx=4的解为正整数,求k的值@~ 定义在R上的函数f(x)满足f(-x)=-f(x),f(x-2)=f(x+2)且x∈(-1,0)时,f(x)=3^x,则f(log3(85))=? 已知,函数f(x)=ax^2+bx-2(x?R.a不等于零).1,判断其奇偶性2,当a＜0时,方程f(x)=x两实根X1,X2满足X1 高中数学函数一道题定义中y=log(a)x,(a＞0且a≠1)若a＜1,则图像是单调递减的.若a＞1,则递增.那么有的题是这么问的 判断函数y=log(1/3)x^2-4x+5的单调区间.这怎么回事?这个函数不也是近似可以看做 设lg[f（x）*g（x）]的定义域为集合A,lg[f(x)]的定义域为集合B,lgg（x）的定义域为C,则A、B、C之间有（ ）A.C⊆B⊆AB.(B∩C）⊆AC.A=B∩CD.（B∪C）⊆AB//////////// B,C有什么区别? 第一问会做,第二问不会.也不知道第二问和第一问之间有什么关联?为什么放在一道题里呢?求问解题的思路和方法,感恩! 问一道高中的英语的题目 已知定义在R上的奇函数f(x)在（0,+∞）上单调递增,且f(2)=0,则不等式xf(x)＞0的解集为 f(x)在(-无穷,0)并(0,+无穷)为奇函数,在R+上单调递增,f(1)=0,解不等式 (x-0.5)f(x)0越快越好解不等式 1)(x-0.5)f(x)0是两个不等式 若奇函数f(x)在(0,无穷大)上单调递增,且f(2)=0,则不等式xf(x)>0的解集是 若函数f(x)满足f(-x)=-f(x),又在x>0上单调递增,且f(3)=0,则不等式xf(x) 已知奇函数f（x）在（0,+∞）上单调递增,且f(3)=0,则不等式x*f（x） 关于x的方程kx=6-x的解是正整数,则k=_______ 是否存在整数M,使关于X的不等式样1+M/3X>X/M+9/M与X+1>(X-2+M)/3是同解不等式?若存在,求出整数M的值和不等式的解集;若不存在,请说明理由(要有过程) They were walking home _____ a tall man stopped them and demanded their purses.A.when B.while C.that D.until 为什么?还有,为什么不能选D?我觉得选until可以突出“他们走路回家”这个动作一直持续到那男的拦住他们… M:Where are we now,ladies and gentlemen?W:Weˊre walking in the largest square in the world and heading for the Great Hall of the People.Question:Which direction are they facing now?A.The westB.The northC.The south请说明理由, we all know that,______________,the situtaion will be declining.A.if not dealt carefully with B.if not carefully dealt withC.not if dealt with carefully D.not if carefully dealt with The writer was so _____ in her work that she didn't notice a stranger enter the room.A.absorbed B.centered为什么另一个不对... 一道高中英语题目．____ others say, the professor is sure that his theory is correct.A．No matter how B．It doesn’t matterC．Whatever D．What ever为什么不选C...答案选D 函数f(x)对任意的a,b属于R都有f(a+b)=f(a)+f(b)-1,并且当x>0时f(x)>1.1.求证：f(x)是R上的增函数2.若f(4)=5,解不等式f(3m²-m+2)0时f(x)>1.1.求证：f(x)是R上的增函数2.若f(4)=5,解不等式f(3m²-m+2) 是否存在整数m,是不等式mx-m>3x+2的解为x