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设<img align="middle" alt="" src="/api/uploads/60000062065/in-rich-contentcreated_at=1648696617">为<img align="middle" alt="" src="/api/uploads/60000062066/in-rich-contentcreated_at=1648696617">矩阵，<img align="middle" alt="" src="/api/uploads/60000062067/in-rich-contentcreated_at=1648696617">为<img align="middle" alt="" src="/api/uploads/60000062068/in-rich-contentcreated_at=1648696617">矩阵，且乘积矩阵<img align="middle" alt="" src="/api/uploads/60000062069/in-rich-contentcreated_at=1648696617">有意义，则<em>C</em>为（　）矩阵．(单选题)
.<img align="middle" alt="" src="/api/uploads/60000062070/in-rich-contentcreated_at=1648696617">
.<img align="middle" alt="" src="/api/uploads/60000062071/in-rich-contentcreated_at=1648696617">
.<img align="middle" alt="" src="/api/uploads/60000062072/in-rich-contentcreated_at=1648696617">
.<img align="middle" alt="" src="/api/uploads/60000062073/in-rich-contentcreated_at=1648696617">

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出自：2024年国家开放大学答案

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