Question

Find the 13th term of the geometric sequence 3,-15,75

Answer 1

Answer: 13th term is 731,421,875

Explanation:
a(n) = nth term
a1 = first term
r = common ratio

1. a(n) = a1(r)^n-1

2. a(13)= 3(5)^13-1

3. a(13) = 3(5)^12

4. a(13) = 732,421,875