The recursive formula of the explicit formula
is 
The explicit formula is given as:

When n = 1, we have:


When n = 2, we have:


When n = 3, we have:


So, we have:



Rewrite the functions as follows:



So, we have:



Express 2 as 3 - 1

Substitute n for 3

Hence, the recursive formula is 
Read more about recursive and explicit formulas at:
brainly.com/question/11235928
<span>Yes, one per router interface, so at the very least 2.</span>
Answer:
Graphical User Interface (GUI)
Explanation:
Graphical User Interface clicking on various icons to perform a certain functionality. GUI is a form of user interface that allows users to interact with electronic devices through graphical icons and audio indicator such as primary notation, instead of text-based user interfaces or command line interface where you would have to type to run the program rather than just click it.
Answer:
The bystander effect is a theory that people are less likely to help if there are others around.
hope this helped :D