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题目内容双击单词支持查询和收藏哦～
Set A={1, 2, 3}
Set B={1, 2, 3, 4}
Set B={1, 2, 3, 4}
Quantity A
The number of different four-digit integers that can be formed by elements from Set A (all the elements can be used by more than once)
Quantity B
The number of different three-digit integers that can be formed by elements from Set B (all the elements can be used by more than once)
A显示答案
以上解析由 考满分老师提供。
