Question

What are the values of A1 and R of the geometric series 1 + 3 + 9 + 27 + 81

Answer 1

Answer: a₁ = 1 and r = 3

Step-by-step explanation: took the test

Answer 2

A1 is the first term, in this case, A1 is 1
R is the ratio between adjacent numbers, in this case, R=3 because 3/1=3, 9/3=3, 27/9=3, 81/27=3