Question

A sequence is generated by an=3(2)n -1. what is the value of it's fifth term

Answer 1

`\begin{gathered} a_n=3(2)n-1 \\ \text{hence, for n=1 one has} \\ a_1=3(2)(1)-1 \\ a_1=6-1 \\ a_1=5 \\ \text{Now, in the same manner, when n=5, one has} \\ a_5=3(2)(5)-1 \\ a_5=30-1 \\ a_5=29 \end{gathered}`