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【简答题】
已知函数 f ( x )=- x 2 +8 x , g ( x )=6ln x + m . (1)求 f ( x )在区间[ t , t +1]上的最大值 h ( t ); (2)是否存在实数 m 使得 y = f ( x )的图象与 y = g ( x )的图象有且只有三个不同的交点?若存在,求出 m 的取值范围;若不存在,说明理由.
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举一反三
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She is surprised by the fact the professor shared,
B.
She is concerned that she misheard the professor.
C.
She is not sure about a term the professor just used.
D.
She is having trouble following the discussion.
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A.
化学平衡时,各物质的化学势相等
B.
化学平衡时,系统的热力学性质不随时间变化
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化学平衡态,是化学反应在该条件下的限度
D.
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货币均衡在一定程度上反映了经济总体均衡状况
B.
货币均衡是货币需求与货币供给在数量上的完全一致
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They often bite bees and then die.
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They like to eat honey very much.
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A.
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B.
重托时托盘不能与肩接触
C.
重托主要用于运送较重的物品
D.
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【单选题】What is a fact about these small wild birds?
A.
They often bite bees and then die.
B.
They like to eat honey very much.
C.
They cooperate with humans to get food from bees.
D.
They usually don’t like to eat the bees’ nest.
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B.
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B.
独塔尔
C.
热瓦甫
D.
冬不拉
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