Question

Find the third term in a geometric sequence if a = 8 and r = -1. Use the formula a(subscript n) = arⁿ⁻¹

Answer 1

Answer:

$a_{3} = 8$

Step-by-step explanation:

=> $a_{n} = ar^{n-1$

Where n = 3, a = 8 and r = -1

=> $a_{3} = (8)(-1)^{3-1}$

=> $a_{3} = (8)(1)$

=> $a_{3} = 8$