已知f(x) =-4cos^2x+4√3asinxcosx,将f(x)图象按向量b=(-π/4,2)平移,图象关于直线x=pai/12对称(1)求a的值,求f(x)取最大值时x的集合(2)f(x)单调区间
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![已知f(x) =-4cos^2x+4√3asinxcosx,将f(x)图象按向量b=(-π/4,2)平移,图象关于直线x=pai/12对称(1)求a的值,求f(x)取最大值时x的集合(2)f(x)单调区间](/uploads/image/z/14885153-17-3.jpg?t=%E5%B7%B2%E7%9F%A5f%28x%29+%3D-4cos%5E2x%2B4%E2%88%9A3asinxcosx%2C%E5%B0%86f%28x%29%E5%9B%BE%E8%B1%A1%E6%8C%89%E5%90%91%E9%87%8Fb%3D%28-%CF%80%2F4%2C2%29%E5%B9%B3%E7%A7%BB%2C%E5%9B%BE%E8%B1%A1%E5%85%B3%E4%BA%8E%E7%9B%B4%E7%BA%BFx%3Dpai%2F12%E5%AF%B9%E7%A7%B0%EF%BC%881%EF%BC%89%E6%B1%82a%E7%9A%84%E5%80%BC%2C%E6%B1%82f%EF%BC%88x%EF%BC%89%E5%8F%96%E6%9C%80%E5%A4%A7%E5%80%BC%E6%97%B6x%E7%9A%84%E9%9B%86%E5%90%88%EF%BC%882%EF%BC%89f%EF%BC%88x%EF%BC%89%E5%8D%95%E8%B0%83%E5%8C%BA%E9%97%B4)
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