在2010年上海世博会临近前的一段时间,为确保博览会期间某路段的交通秩序,交通部门决定对该路段的车流量进行检测,以制定合理的交通限行方案.现测得该路段汽车的车流量y(千辆/小时)与汽车的平均速度v(千米/小时)之间的函数关系为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231127065555259/SYS201311012311270655552019_ST/0.png)
.
(1)在该时段内,当汽车的平均速度v多大时,车流量最大?最大车流量是多少?
(2)若要求在该时段内车流量不超过9千辆/小时,则汽车的平均速度应控制在什么范围内?
考点分析:
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n}中,a
1=1,S
n为前n项和,且满足S
2n-2S
n=n
2,n∈N
*.
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2及{a
n}的通项公式;
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已知:在△ABC中,a,b,c分别是角A、B、C所对的边,向量
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sin
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2+y
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对大于1的自然数m的三次幂可用奇数进行以下方式的“分裂”:
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231127065555259/SYS201311012311270655552015_ST/0.png)
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3的“分裂数”中有一个是59,则m的值为
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设P为曲线C:y=x
2+2x+3上的点,且曲线C在点P处切线倾斜角的取值范围为[0,
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