How do you write an nth term rule for #1,-4,16,-64# and find #a_6#?
1 Answer
Explanation:
The series here looks to be:
This does present a slight ambiguity in the way the question was asked. That is, if we assume that we start counting from
However if we want to start counting from
The later formula is advantageous in that the
Thus, it is not completely clear what the correct answer would be for
It may be:
if we started counting from
Or
if we started counting from
We'll note that the first answer is actually the 6th term in the series, while the second is actually the 5th. If this problem were presented on homework I would most likely ask for clarification from the instructor.