某种商品的收入函数为<img alt="" height="24" src="/api/uploads/1526376/in-rich-contentcreated_at=1647288658" width="111">,则当销售量q = 5时,边际收入<img alt="" height="21" src="/api/uploads/1526377/in-rich-contentcreated_at=1647288658" width="53">100(判断题)
.对
.错
出自:2024年国家开放大学答案