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对于函数 f(x) = (2x - 1)/(x + 3) :(a) 确定定义域和值域;(b) 验证是否单射;(c) 求反函数。
对于函数 f(x) = (2x - 1)/(x + 3) :(a) 确定定义域和值域;(b) 验证是否单射;(c) 求反函数。
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