Answered: Let A = {2, 4, 6, 8}, B = {6, 9}, C =…

Let A = {2, 4, 6, 8}, B = {6, 9}, C = {4, 8}. Answer each of the following questions. Justify your answers. 20.Is C ⊆ A? 21.Is B ⊆ A? 22.Is C ⊆ A? 23. Is B ⊆B?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Let A = {2, 4, 6, 8}, B = {6, 9}, C = {4, 8}. Answer each of the following questions. Justify your answers.
20.Is C ⊆ A?
21.Is B ⊆ A?
22.Is C ⊆ A?
23. Is B ⊆B?

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