已知函數f（x）=log2（x+1）+alog2（1-x）是奇函數，求a值，求f（x）的解析式；. 已知函數f（x）=log2ˇ（1+x）+alog2ˇ（1—x）為奇函數.求a的值，f（x）的解析式

已知函數f（x）=log2（x+1）+alog2（1-x）是奇函數，求a值，求f（x）的解析式；. 已知函數f（x）=log2ˇ（1+x）+alog2ˇ（1—x）為奇函數.求a的值，f（x）的解析式

f（-x）=log2 1-x+alog1+x=-f（x）=-log 2 1+x -alog2 1-x
log2 1-x+alog1+x=-log 2 1+x -alog2 1-x所以a/1-x=1-x就可以接了
若函數f（x）=sinax+cosax（a＞0）的最小正週期為1，則它的圖像的一個對稱中心為（）
A.（−π8，0）B.（0，0）C.（−18，0）D.（18，0）
f（x）=sinax+cosax=2sin（ax+π4）T=2πa=1，則a=2π所以f（x）=2sin（2πx+π4）令f（x）=0，則其中有：2πx+π4=0x=-18即其中一個對稱中心是（-18，0）故選C.
數軸上點A對應的數是-1，一隻螞蟻從A點出發沿著數軸向右以每秒3個組織長度的速度爬到B點，用2秒吃光了B點
食物，又沿原路以原速度返回A點，共用去6秒，則螞蟻爬行的路程是幾個組織長度？B點與A點的距離是多少個組織長度？B點對應的數是多少？
爬行時間是6-2=4秒
所以路程是4×3=12個組織長度
AB距離是12÷2=6個組織長度
向右的
所以B是-1+6=5
英語作文：Making tea
各位路過的大哥哥大姐姐們，小弟急需一篇內容為“Making tea”的作文，100個單詞左右.Series ofactions:boil water，take out teapot，prepare era leaves，pour boiled water into erapot，steep a moment before drinking
Looks far long cannot see you，your indignation，where flies？In the fog flies，the imagination dark night after the county let alone to，do not let me be sad，only then said is not intentionally，I actually am unable to blame you..let alone to not .
－－Prefatory remarks
The year，comes also in a hurry，went in ahurry.hasalso carried off section of unforgettable recollections，actually left behind sound sadsorry.meto me calmly to lie prone in front of the window，the eye dull dull looks in front of the window all was beautiful，my heart，really thecold.thiskind of feeling was such pain.
Do you，why have like this？Has kept why only a note to me，why doesn't come earlier to tell me？On paper sorry，what also can represent？No，don't I want thissorry.leavebehind it，what I really cannotmake.actually，I want to detain，only is this purefriendship.notright？Friendship this kind of thing，likes cup of cool boilingwater.notto need to add onthe sugar，let us drink has feltjoyful.therefore，I drank have been used to the kind of delicacy friendship green tea，disliked these not not really actually to have the sweet taste the syrup，the drink，more repugnant coffee.I did not want you to remain for mine some simple things，perhaps，said to you，only could use to explain with me，but，I did not want，I did not need these.
I，a sentimentalgirl.ordinaryday，has your this and I melts into with the warm heart in the same place，then makes me feel many somewhat is warm and in theregards.life，I really cannot lack between us this friendship.I continuously all to treat as you the best friend to regard，therefore，I really need between us this friendship……
Did you，really too make me bedisappointed.letalone sorry，what sorry cannot leavebehind.youto me why with me to say not in front of has walked？Facing front is constructing on the work site rumbling the sound，my heart，more chaotic.
挑幾篇
已知函數，f（x）=log2 1-mx/x-1的影像關於原點對稱
（1）函數f（x）= log 2 [（1–mx）/（x–1）]的影像關於原點對稱，說明函數f（x）是奇函數，定義域關於原點對稱，求f（x）的定義域：（1–mx）/（x–1）> 0 =>（1–mx）（x–1）> 0，所以當且僅當m = -1時，對應f（x）= l…
若函數f（x）=sinax+cosax（a＞0）的最小正週期為1，則它的圖像的一個對稱中心為（）
A.（−π8，0）B.（0，0）C.（−18，0）D.（18，0）
f（x）=sinax+cosax=2sin（ax+π4）T=2πa=1，則a=2π所以f（x）=2sin（2πx+π4）令f（x）=0，則其中有：2πx+π4=0x=-18即其中一個對稱中心是（-18，0）故選C.
數軸上點a對應的數為-1，一隻小蟲從a點出發，沿著數軸一每秒5個組織的速度爬行至b點，
在立即沿原路返回A點，共用9秒.問：（1）小蟲爬行的路程是多少個組織長度？（2）B點對應的是多少？緊急！快！
（1）小蟲爬行的路程是：5×9=45個組織長度
2、如果B在A的右邊，B點對應的是：45÷2-1=21.5
如果B在A的左邊，B點對應的是：-1-45÷2= -23.5
求一篇關於How to make tea的英語作文，10句左右
How to Make Tea？
Tea is one of the most popular drinks all over theworld.Inorder to make a good tea drink，firstly，you must have to make tea pot and tea cups warmed up with hotwater.Inthis way，tea pot and tea cups can have the same temperature as the tea prior to serving thetea.Thenext step of it is to use the right tool to put tea，like green tea，into the tea pot.Don’t use your hands because the tea will absorb foreignsmell.Thethird one is to put hot water into the teapot.Andthen cover the tea pot and use hot water to warm up thelid.Youjust wait for only a few minutes for the completion of making teadrink.Inthe next step，you have to wipe the water around the tea pot with towel prior to pouring the tea into the teacups.Finally，prior to pouring tea into tea cups，you can put the tea cups in a line，then pour tea into the tea cups and move tea pot back and forth along tea cups to ensure that the flavor is distributed for each individual teacup.Andrelax and enjoy your delicious cup of tea.
已知函數f（x）=log2（x-3）+1/（x+2）
求函數的定義域
求f（4），f（7/2）的值
對數有意義，真數>0
x-3>0 x>3
分式有意義，分母≠0
x+2≠0 x≠-2
綜上，得x>3，函數的定義域為（3，+∞）
f（4）=log2（4-3）+1/（4+2）=0+1/6=1/6
f（7/2）=log2（7/2 -3）+1/（7/2 +2）=log2（1/2）+ 2/11=-1 +2/11=-9/11
函數f（x）=sin2x＋cos（2x－π／6）在區間[0，π／2]上的最大值及對應的x值.
f（x）=sin2x+cos2xcosπ/6+sinπ/6sin2x
=sin2x+cos2x*√3/2+1/2sin2x
=3/2sin2x+√3/2cos2x
=√3sin（2x+π/6）
0≤x≤π/2
π/6≤2x+π/6≤7π/6
所以最大值為當2x+π/6=π/2時，即x=π/6時
取到最大值√3