sqrt [4](2) C. dfrac (1)(2) D. https:/img.zuoyebang.cc/zyb_8aa7776a94adbf79d8d68f0ee8c17321.jpg-dfrac (1)(sqrt [4]{2)}

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https:/img.zuoyebang.cc/zyb_e8bd054ef3dd65e8f324cadbf8b2d8a0.jpg-beta , 且β已知 E. https:/img.zuoyebang: https:/img.zuoyebang.cc/zyb_e8bd054ef3dd65e8f324cadbf8b2d8a0.jpg-beta , 且β已知 E.

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