What is first and third term

Question

An=25/3(3/5) n-1 

what is the first term of this geometric sequence 

what is the third term of this geometric sequence 

 

enter a number like 9/7 or 5 in each box

Answer 1

an = (25/3)(3/5)^(n-1)

a1 = 25/3 = 8 1/3 = 1st term

a3 = (25/3)(3/5)^2 = (25/3)(9/25 = 3

a1,a2,a3, ... = 25/3, 5, 3, ...