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设<img align="middle" alt="" src="/api/uploads/1529523/in-rich-contentcreated_at=1647290103">，方程两边对<img align="middle" alt="" src="/api/uploads/1529524/in-rich-contentcreated_at=1647290103">求导，可得（　）.(单选题)
.<img align="\"middle\"" alt="\"\"" src="\"/api/uploads/1529525/in-rich-contentcreated_at=1647290103\"">.,.
<img align="\"middle\"" alt="\"\"" src="\"/api/uploads/1529526/in-rich-contentcreated_at=1647290103\"">.,.
<img align="\"middle\"" alt="\"\"" src="\"/api/uploads/1529527/in-rich-contentcreated_at=1647290103\"">.,.
<img align="\"middle\"" alt="\"\"" src="\"/api/uploads/1529528/in-rich-contentcreated_at=1647290103\"">

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出自：2024年国家开放大学答案

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