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82问答网 > y等于三倍的sin(2x-三分之兀)x属于三分之兀到四分之三兀求值域

y等于三倍的sin(2x-三分之兀)x属于三分之兀到四分之三兀求值域

2025-03-15 05:09:43

推荐回答（1个）

回答1：

x∈[π/3,3π/4]
所以，2x∈[2π/3,3π/2]
所以，2x-(π/3)∈[π/3,7π/6]
所以，sin[2x-(π/3)]∈[-1/2,1]
所以，y=3sin[2x-(π/3)]∈[-3/2,3]

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