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求下列函数取得最小值自变量x的集合,并求出最小值x?y=-2sinx ,x∈R y=2-cosx/3,x∈R 试题 第六题 2010~2011学年度第一学期期末教学质量检查,九年级英语期末试题,那个他作文是关于亚运的, 求函数y=│x+1│+│x-1│+│x-3│的最小值,及取最小值时自变量X的值 y=2-cosx/3.求出函数取得最小值的自变量X的集合,并写出最小值 初二下英语1-6单元试卷 【急用】 求初二英语和数学1-6的单元测试题 还有期中测试题要上学期的 求初二英语（上册）第1~3单元测试题!任何教材都可以 英语翻译 10x+1200=10乘3x 求使下列函数取得最大值和最小值的自变量x的集合（1）y=1-(1/2)cos(π/3)x,x∈R的最值（2）y=3sin(2x+π/4),x∈R的最值 求使下列函数取得最大值,最小值的自变量x的集合,并写出最大值和最小值是什么y=1-(1/2)cos(π/3)x x属于R cos(π/3)x=1时最小值1/2(π/3)x=2kπ ,x=6k (k∈Z)cos(π/3)x=-1时最大值3/2(π/3)x=2kπ＋π ,x=3（2k＋1） 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（1）y=3-2sinx (2)y=sinx/3 这几道英文题怎么做啊?1, when he arrived at the bus stop, the bus___for 20 minutes. A,has left. B,had left. C,has been away. D,had been away. 2,I __ the League for 5 years so far. A,joined. B,have joined. C,have been in 3,You mustn't __ un 解关于x的方程：ax+b-（3x+2ab）/3=1/2 说清楚易懂的 谢 谢 问一个数学题：解关于x的方程ax+b-3x+2ab/3=1/2 求函数y=2sin(3x+3/π)的周期,单调区间,最大值与最小值,并分别写出取到最大值与最小值时自变量x的集合 关于x的方程kx=3+x的解是整数,则k所能取的整数值有（ ） 方程ax+b=c的解是x=3求方程3ax+5b=5c的解 求文档:已知AX+BY=C的解为X=3,Y=4求方程3AX+2BY=5C的解把X=3，Y=4带入 求方程ax+b=c的解是x=3,求3a+5b=5c的解时间紧急 解关于X的方程：2分之AX-3+3分之AX-5B=1（A≠0） 1．Last month ,part of Southeast Aisa was struck by floods,from _____effects the people are still suffering.A.that B.whose C.those2.Mark was a student at this university from 1999 to 2003,______he studied veryhard and was made Chairman of the Studen 1、In this experiment,they were wakened several times during the night and asked to report what they ______?A.had just been dreaming B.have just been dreaming C.are just dreaming D.had just dreamed答案给的B,为什么?如果不对的话选A还是 1.---Is there anyone in the room?---No one.2.---Is there any person in the room?---None.这两道题有什么区别呢?第一题不可以用none来回答吗? 请帮我解释并解决两个英语练习题He asked me _ with me.A what is the trouble B what wrong was C what was the matter Dwhat trouble it is请就各选项具体解释I am sure_he said is true.A that B about that C of th 请帮我解释一下两道英语题~~~Mr.Green had all his money ------and couldn't--------his holtel bil.(填stolen,pay)The naughty boys were made-------their maths homework the next day.(填to hand in) 若关于x的方程1/3 x=1与3x+2a=ax的解相同,则a=? 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=3sin(2x+兀/4)...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. y=1-1/2cosπ/3x的最大值,最小值怎样求?它们的自变量x的集和呢?到底是怎样做?真的不会. 英语第二题求解释~