已知函数fX=二分之根号三sin2x-cos2x-1/2,x∈R求fx的最小值和最小正周期f(x)
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已知指数函数y=f(x),且发(-3/2)=√5/25,求f(3)的值
hair换一个字母或加一个字母
把hair,no,his各加一个字母,使他们变成别的单词!
()on前加一个字母,and前加一个字母()hat ,()hair ,()eat 前都加一个字母能成什么新单词?还有()up ()down.
若不等式|2a‐1|≤|x+1∕x|对一切非零实数X恒成立,则实数a的取值范围
对于x属于R,不等式|2-x|+|1+x|≥a^2-2a恒成立,则实数a的取值范围为
-Have you heard the song Super Star?-Yes,I hear it sung by S.H.E.
Have you heard the song 《You and Me》?Yes,l heard it【】by sarah brightman.A sing B sung应该是heard sb do sth 做完后 校对了下答案 还是本就选这个,要给理由
-----Have you heard the song Super Star?-----Yes,I heard it ____by S.H.E.A.singB.sung
Have you heard of( )about Jeremy Lin?Yes.He did quite well in the last NBA basketball match.A anything exciting B something interesting C anything humorous D something important
-Have you heard of the buildings_down?-Yes,it's said that they are going to make room for the new ones.-A:having pulled B:having been pulled C:pulled D:to be pulled
问一道比较纠结的物理题电阻越并越小,电压表的电阻很大,相当于断路,如果有足够的电压表和导线,将电压表并联,能不能让一盏与之混联的电灯电阻10欧姆发光,用的电压表是学生在实验室用
Perhaps you have heard ___ about the Interneet (A:a lot B:lots of C:a few D:a little of)为什么?
Have you heard about the Prime Minister?
求函数y=lx-3l+lx+1l的最大值和最小值
求2+lx-3l的最小值,求2-lx-3l的最大值
没几道的 .选择 1.两个力作用在杠杆两端,为了使杠杆两端保持平衡,则()A.这两个力大小必相等 B.这两个力的力臂长短必相等 C.力臂较长的那个力必大 D.力臂较长的那个力必小2.用扳手拧生
在浓度为20%的盐水中加入30千克水,浓度变为15%,再加入几千克盐,浓度变为25%?
向浓度为15%的盐水中加入25克盐,这时盐水的浓度时多少?
在浓度为百分之十五的盐水中,再加入25克盐,这时盐水的浓度是(百分之( )
在浓度为20%的盐水中加入10千克水,浓度变为15%,再加入多少克盐,浓度变为25%?要一步步来解释,不要用字母和方程,用的公式打出来,
若y=x-1的绝对值+x+1的绝对值,则y的最小值是多少
我的高中物理有点困难
How deep I love
I love have eyes for you 啥意思
我是72年生的到今年我年龄多大了?
填空,就一个空,
谁能帮我填上这个空?(是根据首字母填空的题)并把空里填的词的意思告诉我,A:I want to join the chess club.B:Can you play chess?A:Yes,I can.B:Can you play w_____?A:No,I cann't.
按意思填空,每空一词.1.这个周末一起踢足球怎么样?whai about ____ ____ together this weekend?2、在回家的路上,我遇见了一位老朋友.i met an old friend ____ ____ ____ ____.3.她昨天骑自行车去上学了.she _____ __
检查一下,顺便告诉我空着的怎么写
have what I need to te.i love you deep in my heart. thank you什么意思
根据答语填空,完成下面每组对话的问句部分,每空一词~1( )the( )by your watch?Let me see.Oh,it's ten to eight.2( ) ( )your son go to school every day?On foot.3( ) ( ) those socks?They’re Army's.4( )did you say sorry to your