subject
Mathematics, 24.06.2021 17:20 brenyasanders6238

Cho lược đồ quan hệ R(ABCDEI) và tập phụ thuộc hàm: F=\DAB=E. BI = ECDIE→c xác dịnh trên R. Chứng minh rằng: AB → ECD theo hai cách:

a. Cách 1: Dựa vào tính chất của hệ tiên đề Armstrong
b. Cách 2: Sử dụng bao dóng.

ansver
Answers: 2

Another question on Mathematics

question
Mathematics, 21.06.2019 14:00
Which addition property is being illustrated below? (type commutative or associative) (6 + 7) + 1 = 6 + (7 + 1)
Answers: 1
question
Mathematics, 21.06.2019 19:30
Zoey made 5 1/2 cups of trail mix for a camping trip. she wants to divide the trail mix into 3/4 cup servings. a. ten people are going on the trip. can zoey make enough 3/4 cup servings so that each person gets one serving? b. what size would the servings need to be for everyone to have a serving?
Answers: 1
question
Mathematics, 21.06.2019 20:00
Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.
Answers: 1
question
Mathematics, 21.06.2019 21:00
Atriangular field has sides of lengths 21, 39, and 41 yd. find the largest angle. (round your answer to the nearest degree.)
Answers: 1
You know the right answer?
Cho lược đồ quan hệ R(ABCDEI) và tập phụ thuộc hàm: F=\DAB=E. BI = ECDIE→c xác dịnh trên R. Chứng m...
Questions
question
Geography, 15.06.2021 03:40
question
Mathematics, 15.06.2021 03:40
question
Mathematics, 15.06.2021 03:40
question
Mathematics, 15.06.2021 03:40
question
Mathematics, 15.06.2021 03:40
question
English, 15.06.2021 03:40
question
Mathematics, 15.06.2021 03:40
question
Mathematics, 15.06.2021 03:40