Formula

[kayesal]

Write a formula for the general term (the nth term) of the geometric sequence.

2, -1, 1/2, -1/4, 1/8

 

[TchrWill]

Write a formula for the general term (the nth term) of the geometric sequence.

2, -1, 1/2, -1/4, 1/8

Dividing each term by the previos term results in a comon factor of - 1/2.

Therefore, the nth term of this geometric sequence is n = (n - 1)(-1/2)

 

[stapel]

You're told that the sequence is geometric, you have a method for finding the common ratio, you're given the first term, and you have a formula for the n-th term. Where are you stuck?

Please reply showing all of your steps thus far. Thank you.

Eliz.