The explicit formula for the geometric sequence Negative one-ninth, one-third, negative 1, 3, negative 9, ellipsis is f (x) = negative one-ninth (negative 3) Superscript x minus 1. What is the common ratio and recursive formula for this sequence? 3; f(x + 1) = 3(f(x)) −3; f(x + 1) = −3(f(x)) 3; f(x + 1) = (f(x)) −3; f(x + 1) = (f(x))