Answer:
C 
Step-by-step explanation:
Consider the series

The nth term of series is 
The bottom index tells you that n starts changing from 3, so

Thus, the sum of all terms is

Ans123
Step-by-step explanation:
sure what the zoom
Answer:
p is the variable
Step-by-step explanation:
a variable is a letter that represents an unspecified number.
Answer:
if 
Step-by-step explanation:
Given --> 
Substitute
into the equation and solve for
:




So, when 
The answer would be rectangle and a square