How do you write an explicit rule for the sequence R= 2, a1= 5? Algebra Exponents and Exponential Functions Geometric Sequences and Exponential Functions 1 Answer Alan P. Oct 15, 2015 #{(a_1=5,),(a_(i+1)=Ra_i, AAi>=1):}# Explanation: I've assume you meant geometric sequence Answer link Related questions What is Geometric Sequences ? How are exponential functions related to geometric sequences? How do you use the geometric sequence formula to find the nth term? What is the constant ratio "r" mean in a geometric sequence formula? Is the following an example of a geometric sequence: –1, 1, –1, 1, –1, ... ? What is the constant ratio "r" in the example 2, –8, 32, –128? How do you determine the first 5 terms if #a_1=2# and #r=3#? How do you find #a_4# if #a_1=-7# and #r=-3/4#? How do you graph: #y = 2^x + 2#? How do you graph: #f(x)=4^x#? See all questions in Geometric Sequences and Exponential Functions Impact of this question 1802 views around the world You can reuse this answer Creative Commons License