设<img src='https://img2.soutiyun.com/latex/latex.action' />,则du=( ).

A.2xdx-2x<sup>2</sup>dy B.<img src='https://img2.soutiyun.com/latex/latex.action' /> C.<img src='https://img2.soutiyun.com/latex/latex.action' /> D.<img src='https://img2.soutiyun.com/latex/latex.action' />

时间:2023-03-29 09:06:36

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