A vin diagram should help you lay it out
Answer:
Explanation:
A. Max is correct But min will be max(N1,N2) i.e. N2.
B. max=N1, min=0(no common tuples in R1 and R2)
C. max=N1(R1 and R2 are disjoint sets), min=0(all tuples of R1 are present in R2)
D. max=N1*N2, min=N1*N2
Answer:
- <em>chatting</em>: real-time communication via keyboard between two or more users on a local network (LAN) or over the Internet.
- <em>browsing</em>: refers to reading and scanning through data; commonly used to describe when a user reads through pages on the Internet and is also often referred to as surfing.
- <em>e-commerce</em>: commercial transactions conducted electronically on the internet.
Answer:
ummm what system. have to be more specific ^^
Explanation: