她和她的捉迷藏

画出函数f（x）=x²-2x-3,x∈[-3,0]的图像并求最值,求单调区间 f(x)是R上偶函数,当X>=0时,f(x)=X2-2X-3 (1)求f(X) (2)做f(x)图像,指出单调区间 1.3(x+y)-4(x-y)=4 x+y/2 + x-y/6 =6 2.x+2y+3z=7 2x+y+z=7 3x+y+2z=11 3.x:y:z=1:2:7 2x-y+3z=214.4x-3y=1 x+2y-z=5 3x-y+2z=2 3x-5×（x-15)=130 《七律 长征》读了这首诗,我的眼前浮现了红军战士____、____、____、____、____等五幅画面. 因式分解-9x+四分之一+81x的平方 I lost my way( )a snowy night and my sister was quite worried( )me.A.on,with B.on,about C.at,with D.at,about讲一下原因, next week i speak to my sister about u and me. 七律长征在什么情况下写的 4500=x-x*0.16 x是多少? 《七律长征》何时写的 x/1.6=0.08用方程怎么解 是谁写的?的作者是谁?) 9x+4分之1+81x平方 因式分解：-9x+1/4+81x^2 My sister( )(like)to play football 证明关于X的方程(x-a)(x-a-b)=1的两个根中的一个大于a,另一个小于a they have four classes in the morning神马意思 they have four classes in the morning改为单数形式是什么 they have four classes in the moring.提问They have four classes in the moring.写成英语的问句 方程组6m+n=6+3a m+5n=2-a 的解满足m+n大于且等于6,求a的范围 若方程组/5m+n=1-a 的就满足m+n＞0,则a的取值范围为：\m+5n=2 A：a＞3 B：a＜3 C：a≥3 D：a≤3若方程组/5m+n=1-a 的就满足m+n＞0，则a的取值范围为：\m+5n=2 A：a＞3 B：a＜3 C：a≥3 D：a≤3 My sister isn't afraid to speak in p___ My sister used to c___ gum a lot .What about you - I think about _____ (go)to my sister's.How about you - I'll just stay at home _____ (watch) TV . they tell us some ways ( )English well.A each B learning C to learn D teaching .请问哪个对? 方程组 3/m-2/n=2 5m-2n=4 when do you have english classes?we have english classes ____ monday___ friday 用方程组解答,二元一次方程,用初二的只是回答小明以两种形式分别储蓄了2000元和1000元,一年后全部取出,扣除利息所得税后可得利息43.92元.已知这两种储蓄年利率的和为3.24%,问：这两种储蓄 5m-n=7 5m+2n=-2 加减法方程组 详细过程. We often have English classes in the morning.改为We often have English classes in the morning.改为过去时 Some students had more specific ways__(learn) English