## Fanduekisses one year ago Is this still considered a correct answer?

1. Fanduekisses

I was supposed to write an expression for the apparent nth term of the sequence (assume n begins with 1) : 1, -1, 1, -1, 1

2. Fanduekisses

I came up with $a_{n}=\frac{ (-1)^n }{ -1 }$

3. Fanduekisses

but the answer key says it's$a_{n}= (-1)^{n+1}$

4. Vocaloid

both should yield the same result

5. Vocaloid

essentially, the difference between your answer and the textbook answer is that yours divides each consecutive term by -1 and the other answer multiplies each consecutive term by -1, which produces the same sequence an = (-1)^(n+1) = (-1)^n * (-1)^1, using our exponent rules

6. Fanduekisses

^_^ thanks!