The 1st, 5th and 13th terms of an arithmetic sequence, with

Last updated: 7/16/2022

The 1st, 5th and 13th terms of an arithmetic sequence, with common difference d. d + 0. are the first three terms of a geometric sequence, with common ratio r. r 1. Given that the 1st term of both sequences is 12. find the value of d and the value of r.