Question

What is the value of the fourth term in a geometric sequencefor which a, = 10 and r= 0.5?

Answer 1

`\begin{gathered} T_n=ar^(n-1) \\ \\ T_4=10((1)/(2))^(4-1) \\ \\ T_4=10((1)/(8)) \\ \\ T_4=(5)/(4) \\ \\ T_4=1.25 \end{gathered}`

The answer is

`1.25`