Question

Find the ${20}^{th}$ term and $n^{th}$ term of the following G.P. $5,25,125,....$

Answer 1

$\begin{array}{c}a=5\\ r=5\\ T_n=a{r}^{n-1}=5{\left(5\right)}^{n-1}=5^n\\ T_{10}=5^{10}\end{array}$