(理科同学做)已知函数f(x)=Asin(ωx+φ)(A>0,ω>0,|φ|<
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)的部分图象如图所示.
(Ⅰ) 求函数f(x)的解析式;
(Ⅱ) 求函数f(x)的对称轴方程与单调递增区间.
考点分析:
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,分别求:sin(α+β),cos(α-β),tan(α-β)的值.
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的模均为1,它们相互之间的夹角均为120°.
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;
(2)若|k
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|>1 (k∈R),求k的取值范围.
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(文科同学做)在锐角△ABC中,边a,b是方程
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2+x+b<0的解集.
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(理科)给出下面四个推导过程:其中正确的推导为
①∵a,b∈R
+,∴
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=2;
②∵x,y∈R
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;
③∵a∈R,a≠0,∴
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+a≥2
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=4;
④∵x,y∈R,xy<0,∴
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=-[(-
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)+(-
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)]≤-2
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=-2.
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