Answer
$a_1=4$
$a_2=\frac{4x}{5}$
$a_3=\frac{4x^2}{25}$
$a_4=\frac{4x^3}{125}$
$a_5=\frac{4x^4}{625}$
Work Step by Step
$a_n=a_1r^{n-1}$
$a_1=4,~~r=\frac{x}{5}$
$a_2=4(\frac{x}{5})^{2-1}=4(\frac{x}{5})=\frac{4x}{5}$
$a_3=4(\frac{x}{5})^{3-1}=4(\frac{x}{5})^2=\frac{4x^2}{25}$
$a_4=4(\frac{x}{5})^{4-1}=4(\frac{x}{5})^3=\frac{4x^3}{125}$
$a_5=4(\frac{x}{5})^{5-1}=4(\frac{x}{5})^4=\frac{4x^4}{625}$
