y=Asin(ωx+Ψ)(A>0,ω>0,0

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y=Asin(ωx+Ψ)(A>0,ω>0,0
y=Asin(ωx+Ψ)(A>0,ω>0,0

y=Asin(ωx+Ψ)(A>0,ω>0,0
因为最小值2且A>0所以A=2
┃w┃=2π/T=2π/（2π/3）=3又ω>0 即ω=3
（0,-√2）代入y=2sin(3x+Ψ)
又有0

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