2014届江苏省仪征市大仪中学九年级上学期期末考试数学试卷（带解析）

1.已知函数 {#mathml#}

f (x) = s i n (ω x + \frac{π}{6}) (ω > 0)

{#/mathml#} 的最小正周期为4π，则（）

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2.已知函数 {#mathml#}

f (x) = s i n (ω x + \frac{π}{6}) (ω > 0)

{#/mathml#} 的最小正周期为4π，则（）

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3.已知函数f（x）=（ax﹣1）lnx+ {#mathml#}

\frac{x^{2}}{2}

{#/mathml#} ．

（Ⅰ）若a=2，求曲线y=f（x）在点（1，f（1））处的切线l的方程；

（Ⅱ）设函数g（x）=f'（x）有两个极值点x₁，x₂，其中x₁∈（0，e），求g（x₁）﹣g（x₂）的最小值．

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4.

短文填空

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5.

短文填空

On many campuses, it has become a trend for a host of students to participate in various {#blank#}1{#/blank#}(activity). Involved in some positive ones, students find them quite {#blank#}2{#/blank#}(benefit) and rewarding.

A case in point is the English club {#blank#}3{#/blank#} the activity of learning benefits me most. In contemporary world, English learning has gained great popularity and it is {#blank#}4{#/blank#}great importance for students to learn English well. However, I {#blank#}5{#/blank#}(meet) a variety of difficulties in study so far. For instance, I have trouble {#blank#}6{#/blank#}(memorize) words. Sometimes, it is also difficult for me to understand the rules of grammar. Although I can read and write, I cannot express myself freely in English.

Then, how to get a good command of his language for me? I{#blank#}7{#/blank#}(convince) that practice makes perfect and that joining the English club is worthwhile. In the English club, daily practice enables me {#blank#}8{#/blank#}(speak) and write fluently. It is also through constant practice {#blank#}9{#/blank#} I can master the rules of grammar and remember words. I will bear in mind that {#blank#}10{#/blank#} I try my best to practice every day, the future of my English learning will be promising.

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6.

下列二次根式中,最简二次根式是（）

A．