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1. 2 . ( )
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5. 6. ( )
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![]() 同类型试题![]() y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴 ![]() ![]() y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴 ![]() ![]() 我要答疑
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