ashleyy7355 ashleyy7355 23-12-2022 Mathematics Answered Use a recursive function for the geometric sequence 2, −6, 18, −54, ... to represent the 9th term. a. f(9)=f(8)•(-3) b. f(9)=f(1)•(-3)^8 c. f(9)=f(1)+3(8) d. f(9)=f(8)+3(8)