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规定一种新运算a*b=a-b/ab,a*b=3,则分式2a+3ab-2b/b-2a规定一种新运算a*b=a-b/ab,a*b=3,则分式2a+3ab-2b/b-2ab-a的值为多少?
已知a+b/ab=5,求2a-3ab+2b/a+2ab+b值,/号是除号
三个连续偶数的和是120,这三个数中最大的是多少快点,我很急!
化简:5(3a^2b-ab^2)-4(-ab^2+3a^2b)
若f(x)为奇函数,g(x)为偶函数,且f(x)-g(x)=x的平方+3x+2,则f(x)+g(x)=?
221÷17+119÷17如何简便计算是221÷17+119÷17
221÷17+119÷17的简便算法
221×97+221+442怎么简便计算?
已知f(x)是偶函数,g(x)是奇函数,且f(x)+g(x)=x的平方+x-2,求f(x)和g(x)的解析式.
当a=-1/2,b=4时.多项式2a^2b-3a-3a^2b+2a 的值为a.2 b,-2 c,1/2 d,-1/2
要简便计算100~200题
35*200+35怎样简便计算?
简便计算:(-4)^99*(-1/2)^200
1+4+3+2+9+7+5+3+1+0怎么翻译
把下列数字,翻译成中文(1)0.6,(2)3+6,(3)1286(4)9/3
英语翻译The wind tunnel rig noise data in Fig.9 comparefavourably with the data from other automobile and aeroacousticwind tunnels published previously [9–11].With theassumption that the variation of sound pressure level in the azimuthalplane i
把(1)翻译成汉语
求多项式的值:3a+b-(b-a)2+a-5b+2(a-b)2,其中a-b=-2
英语翻译4.2 ElectricityThe electricity load is classified to grade 2 according its nature.Based on local power network,one transformer station is to be set up toproduce alternative current with 3 phaes/4 line 380 v.Two diesel generator are for em
求多项式的值:3a+b-(b-a)2+a-5b+2(a-b)2,其中a-b
英语翻译7]“I have had nearly fifteen years of education in Chinese schools,in which I have been used to the teacher?centered class.It is the traditional way of teaching in China,which is characterized by the one?man show and the absolute author
函数f(x)是一个偶函数,g(X)是一个奇函数,且f(x)+g(x)=1/(x-1),则f(x)等于多少.不过我想知道过程A、1/〔(X^2)-1〕B、2X^2/[(X^2)-1]C、2/[(X^2)-1]D、2X/[(X^2)-1]
若函数f(x)与g(x)分别是定义域为{x|x≠±1}的奇函数与偶函数且f(x)+g(x)=1/x-1,则f(x)等于多少?g(x)等
奇函数f(x) 当x=0时函数等于0,那么偶函数呢?
设A=X的二次方-(减号)XY B=XY+Y的二次方 求 A+B 3A-2B
1.每件毛衣售价从120元降到90元,降价了() ①25%②3分之1③75%
函数f (x)等于x减一分之三是奇函数还是偶函数,
设F(X)是偶函数,G(X)是奇函数,且F(X)=G(X)等于1/(X-1),求F(X)和G(X).定义域都是{X|X不等于1或负1},
若f(x)是偶函数,g(x)是奇函数,且f(x)+g(x)=x-1分之1,求f(x),g(x)
用三角尺画出75.150.120.的角
已知函数f(x)和g(x)的定义域为R,其中f(x)是奇函数,g(x)是偶函数,且f(x)+g(x)=1/(x的平方+x+1),则f(x)/g(x)的值域是?为什么?
question:已知A=2x²+3xy-2x-1,B=-x²+xy-1若3A+6B的值与x的值无关,求y的值.我看了别人的回答,比如3A+6B=15xy-6x-9=(15y-6)x-9 与X值无关,则X的系数等与0此时X取什么值(15y-6)x都为0 则Y=6/15那个-9怎么去掉