Question

What is the 5th term of the geometric sequence described by an

= 5(1.5)n-1?
O a5 = 7.59375
O a5
25.3125
O a5 = 5.0625
O a5 = 37.96875

Answer 1

`a_5=25.3125`

Explanation:

substitute n = 5 into the equation:

`a_5=5(1.5)^(5-1)\\a_5=5 *1.5^4\\a_5=5 * 5.0625\\a_5=25.3125`