Find the common ratio for the sequence a, negative a^2/2, a^3/4, negative a to the power of 4 over 6, etc . (5 points)
Please help and explain
A) negative a over 2
B) a/2
C) a
D) The sequence is not geometric, therefore there is no common ratio.
so just divide a_2/a_1 = (-a^2/2) / a
I guess you could check by dividing a_3/a_2, but unless you suspect trickery, one case will do.
For this question I got a. Is this right please check!
clearly not. a^2/a = a
But that is not what you had.
Also, you do in fact need to check a_3/a_2