已知向量a=(sinwx,sinwx),b=(sinwx,-coswx),(w>0),函数f(x)=a*b的最小正周期为π/2.求y=f(x)的最大值与取得最大值的x集合?我化简到f(x)=1/2-√2/2sin(2wx+π/4)然后T=2π/2w使之等于π/2.那么2w要加绝对值吗,然后分
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![已知向量a=(sinwx,sinwx),b=(sinwx,-coswx),(w>0),函数f(x)=a*b的最小正周期为π/2.求y=f(x)的最大值与取得最大值的x集合?我化简到f(x)=1/2-√2/2sin(2wx+π/4)然后T=2π/2w使之等于π/2.那么2w要加绝对值吗,然后分](/uploads/image/z/5263442-26-2.jpg?t=%E5%B7%B2%E7%9F%A5%E5%90%91%E9%87%8Fa%3D%28sinwx%2Csinwx%29%2Cb%3D%28sinwx%2C-coswx%29%2C%28w%3E0%29%2C%E5%87%BD%E6%95%B0f%28x%29%3Da%2Ab%E7%9A%84%E6%9C%80%E5%B0%8F%E6%AD%A3%E5%91%A8%E6%9C%9F%E4%B8%BA%CF%80%2F2.%E6%B1%82y%3Df%28x%29%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%E4%B8%8E%E5%8F%96%E5%BE%97%E6%9C%80%E5%A4%A7%E5%80%BC%E7%9A%84x%E9%9B%86%E5%90%88%3F%E6%88%91%E5%8C%96%E7%AE%80%E5%88%B0f%28x%29%3D1%2F2-%E2%88%9A2%2F2sin%282wx%2B%CF%80%2F4%29%E7%84%B6%E5%90%8ET%3D2%CF%80%2F2w%E4%BD%BF%E4%B9%8B%E7%AD%89%E4%BA%8E%CF%80%2F2.%E9%82%A3%E4%B9%882w%E8%A6%81%E5%8A%A0%E7%BB%9D%E5%AF%B9%E5%80%BC%E5%90%97%2C%E7%84%B6%E5%90%8E%E5%88%86)
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