Is this a geometric sequence? If so what's the ratio and what are the next three terms. {-1125, -450, -180, -36}
It's not a geometric sequence. Because......
A geometric progression is
a ar ar^2 ar^3 ar^4 ....ar^(n-1) with a as the first term and each term mutiplied by the common ratio r
which you find by dividing any term by its predecessor. ie ar^4 / ar^3 = r You must always get the same answer no matter which term and its predecessor you pick. Try it for your problem and see what happens...... you won't get the same common ratio each time.
