See attached picture for steps
The first option is your answer.
Sigma notation is just a fancy way to shorten a sum of a series of numbers using a set equation. The "n =" tells you where to start in the sequence and the top number tells you where to stop.
Answer: No
Step-by-step explanation: If it is talking about the reciprocal then yes. Reciprocal is the opposite of your number.
Example: -4 IS 4 reciprocal.
159.98 divided by 6 is 26.66, hopefully this is correct...