题文
已知：定义域为R的函数f（x）为奇函数，当x＞0时，f（x）=" x3" +1；则x＜0时，f（x）的解析式为
A f（x）=" x3" +1 B f（x）=" x3" -1 C f（x）=" -x3" +1 D f（x）=" -x3" -1
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已知：定义域为R的函数f（x）为奇函数，当x＞0时，f（x）=" x3" +1；则x＜0时，f（x）的解析式为
A f（x）=" x3" +1 B f（x）=" x3" -1 C f（x）=" -x3" +1 D f（x）=" -x3" -1
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