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f(x)=2(√3/2sin2x+1/2cos2x)=2sin(2x+π/6)
T=2π/2=π
2kπ-π/2≤2x+π/6≤2kπ+π/2
2kπ-2π/3≤2x≤2kπ+π/3
kπ-π/3≤x≤kπ+π/6
递增区间[kπ-π/3,kπ+π/6]
k为整数
T=2π/2=π
2kπ-π/2≤2x+π/6≤2kπ+π/2
2kπ-2π/3≤2x≤2kπ+π/3
kπ-π/3≤x≤kπ+π/6
递增区间[kπ-π/3,kπ+π/6]
k为整数
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