搜题

求XX的取值范围都是默认为求定义域范围吗?知道的快说下.

化学答案 2023-04-27

问题描述:

求XX的取值范围都是默认为求定义域范围吗?
知道的快说下.


最佳答案:

那就不一定了(主要看x在本题中是否为自变量).
如果是求定义域,表示求自变量的取值范围,
恰好x是自变量,就是求x的取值范围.比如:y=3x+5
如果x是函数(因变量),就是求值域了.比如x=3t+5.

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