Question

Find the nth term of the geometric sequence where

Answer 1

\[a = 4\]
\[a _{1} = 2\]
\[a _{2} = 1\div2\]
\[a _{3} = 1\div4\]
\[a _{4} = 1\div8\]
\[a _{5} = 1\div16\]

nth term = \[1\div 2^{n-1}\]