求解答啊!!!
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(1)f(x)=√3sin(2ωx)/2-[1+cos(2ωx)]/2+1/2
=sin(2ωx-π/6).
T=2π/(2ω)=π/2,所以ω=2
f(x)=sin(4x-π/6)
f(2π/3)=sin(8π/3-π/6)=sin(π/2)=1/
=sin(2ωx-π/6).
T=2π/(2ω)=π/2,所以ω=2
f(x)=sin(4x-π/6)
f(2π/3)=sin(8π/3-π/6)=sin(π/2)=1/
追答
对称中心:
令4x-π/6=kπ,k∈Z,则x=kπ/4+π/24.
对称中心为(kπ/4+π/24,0),k∈Z.
(2)2kπ+π/2≤4x-π/6≤2kπ+3π/2,k∈Z.
所以kπ/2+π/6≤x≤kπ/2+5π/12
令k=0得单调递减区间为[π/3,5π/12],k∈Z.
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