Find a ⋅ b. a = <2, 4>, b = <2, 5> please explain.?
回答 (1)
2019-01-26 6:10 am
✔ 最佳答案
a • b = ( 2i + 4j ) ( 2i + 5 j )a • b = 4 + 20
a • b = 24
收錄日期: 2021-05-01 22:18:37
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https://hk.answers.yahoo.com/question/index?qid=20190125205532AA0bVBD