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21.(12分)已知关于x的不等式2+2mx>1一2.(1)若对任意的实数x,不等式恒成立，求实数m的取值范围：(2)若对于0m2,不等式恒成立，求实数x的取值范围，容。氏。馆面不...

B.请阅读下面短文，根据语篇内容，用方框中所给词的正确形式填空，使短文通顺、连贯，并将答案写在答题卡相应的位置上。方框中有两个词为多余项。grow what foun...

1.(18分)在数列{an}中，a1=3,a2=1,且n。a+1=0a+1一a+2ant21)让明：数列。品是等比数列（2设6=1-0(-2，求证16+…中6>-导【解题分标1由2=，得a-r2，an+222洁高+十汁...

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owiput yourself at greater risk or get los第三部分2L》语言知只运用两节分45分第一节（共20小题：每小题15分，满分30分）or wild animals.We cangave this re...

C.leam something important from themD get their valuable personal information45.By saying"Amy did so.",the writer wants toellusA.Amy sent a thousand d...

Which do you prefer:traditional search engines or social media platforms?I prefer Bilibili.It was difficult for me to learn math in the past,so Ioften...

21.(12分)在△ABC中，A(-1,多)，边AC上的高BE所在的直线方程为5x十3y-15=0,边AB上的中线CM所在直线的方程为x一10y十20=0.(1)求点C的坐标；(2)求点B的坐标.(op-6支...

.f(x)=2x2-4x十3(x≥1)，………3分g（(x)=3ax2+2bx,直线x+3y-4=0的斜率为-号，切线与此直线垂直，…5分.g'(1)=3a+2b=3,且g(1)=a+b=1,解得a=1,b=0;…6分(2)依题意mf(x)...

We were so happy that we didn't want to sleep.My father played the guitar for me and my mothertoldstories to my brother.What a great weekend weSection...