z=10-3x^2-3y^2ƽz=4Χ

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解方程:(1)1/2(2x-3)²=49/2(2)1/3(1/5-x)²=3/25 (3)1/3(x+1)²-12=0(4)x/a-a=0(5)(2x-3)²-121=0(6)x²-(根号2+根号3)x+根号6=0 人教版六年级英语毕业练习试卷二. 用适当的代词填空:  1.Are those 【 】 trousers?No,【 】aren't 【 】 .【】 are blue.(they)  2.Tom,where's【 】bike?Is this black bike No,it isn't 【】 .(my,mine,your,yours) 新目标八年级英语竞赛题供暑假提高用 那里有八年级英语竞赛的试题或辅导?总结归纳型的 八年级英语竞赛题I stop my carrige to enjoy the sight of maple trees,The frosty leaves look redder than flowers in early spring.是什么古诗?智力测试1.What always gose up and never gose down?2.Why did the boy make his dog sit in the sun 已知函数f(x)=sin^2x+2sinxcosx-cos^2x,x∈R,求函数f(x)的最小正周期求函数f(x)的最小正周期,函数fx取最大值时x的取值集合,函数fx的图像可由函数y=sinx,x∈R的图像经过怎么样变换得到的 不等式组x=4y+20,7y 纯英语的六年级语数英试卷我要的是纯英语的试卷,是题目要求都是英文的试卷,而且是六年级小升初的试卷,要有综合试题和奥数试题和英语题. 六年级语数英试卷今年的! 判断下列函数的单调性,并求出单调区间,f(x)=sinx-x,x属于(0,π).第二题f(x)=2x^3+3x^2-24x+1 六年级毕业考试卷及答案(语数英) 函数y=2sinxcosx-2sin^2x+1的最小正周期是 2009——20010六年级语数英总复习试卷人民教版的!人民教版的! 已知函数f(x)=2sin^2x+2sinxcosx-1,x属于R(1)求f(x)的最小正周期及f(x)取得最小值时x的集合PS:过程最重要.我这道题一点都不懂,不要漏掉什么 特别是化简的过程 对于不等式1/8(2t-t^2)≤x^2-3x+2≤3-t^2,试求对x∈[0,2]都城里的实数t的取值范围对于不等式1/8(2t-t^2)≤x^2-3x+2≤3-t^2,试求对x∈[0,2]都城里的实数t的取值范围 对于不等式1/8(2t-t^2)≤x^2-3x+2≤3-t^2,试求对区间[0,2]上的任意x都成立的实数t的取值范围就是这个 高二数学已知不等式x²+px+q的解集为{x\1<x<2},则不等式x²+px+q\x²-5x-6>0的解集是() 当0≤x≤2时,不等式1/8(2t-t)≤x-3x+2≤3-t恒成立,求t的取值范围? 求是下列函数取得最大值、最小值的自变量的集合,并写出最大值、最小值各是多少.(1)y=2sinx,x∈R(2)y=2-cosx/3 ,x∈R 英语翻译Australia is called the Land Down Under (地球的另一边)because it is below the equator(赤道).It is one of the seven continents (大陆)of the world.It is also a country.  The first people to live in Australia were aborigines.( 求使下列函数取得最大值,最小值的自变量x的集合,并分别写出最大值,最小值是什么.(1)y=1—1/2cosπ/3x,x∈R(2)y=3sin(2x+π/4),x∈R 英语翻译I will never forget the lessen which Mr.Li gave us.One day Mr.Li was speaking to us in our school meeting room.He began his speech by holding up a ¥100 bill.He asked,"Who would like this ¥100 bill?" Most of us put up our hands quickly 英语翻译Don't we allI was parked in front of the mall wiping off my car.I had just come from the car wash and was waiting for my wife to get out of work.Coming my way from across the parking lot was what society would consider a bum.From the look 3x平方+(-二分之三x+三分之一y平方)(2x-三分之二y)3x的平方+(-2分之3 x+3分之1 y的平方)(2x-3分之2y),其中x=-3分之1,y=3分之2,求值【(xy+2)(xy-2)-2x平方y平方+4】÷xy,其中x=10,y=-25分之1x(x+2y)-(x+1 求使下列函数取得最大最小值的自变量集合,并写出最大最小值.1.y-2sinx,x属于R 2.y=2-cos3/x,x属于R谢,求详解 写出最大值最小值的自变量集合,和写出最大值最小值各是多少 y=2sinx,x∈R,y=2-cosx/3,x∈R 第二题. 第五题 判断下列函数奇偶性:(1) f(x)=2x^4+3x^2 (2) f(x)=x^2-2X (3) f(x)=(x^2+1)/x (4) f(x)=x^2+1要详细的过程!谢谢!急! 判断函数f(x)=3x在R上的奇偶性 已知函数f(x)=2sin^2(π/4+x)-√3cos2x 1.求f(x)的最小正周期和单调减区间 已知函数F(X)=2sin²(π/4+X)-√3cos2x-1,x∈R,求f(X)的最小正周期