已知函数f(x)=3sin(wx+α)-1(w>0,α绝对值<π/2)周期为π,且f(0)=1/2求f(x)的单调区间
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已知函数f(x)=3sin(wx+α)-1(w>0,α绝对值<π/2)周期为π,且f(0)=1/2求f(x)的单调区间已知函数f(x)=3sin(wx+α)-1(w>0,α绝对值<π/2)周期为π,且
已知函数f(x)=3sin(wx+α)-1(w>0,α绝对值<π/2)周期为π,且f(0)=1/2求f(x)的单调区间
已知函数f(x)=3sin(wx+α)-1(w>0,α绝对值<π/2)周期为π,且f(0)=1/2求f(x)的单调区间
已知函数f(x)=3sin(wx+α)-1(w>0,α绝对值<π/2)周期为π,且f(0)=1/2求f(x)的单调区间
因为函数周期为π,所以2π/w=π,得w=2
又因为f(0)=1/2,所以3sinα-1=1/2,计算得α=2kπ+π/6,因为α绝对值<π/2,所以α=π/6
所以f(x)=3sin(2x+π/6)-1
当2kπ-π/2
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