## Intermediate Algebra for College Students (7th Edition)

$0.00032$
Formula to calculate the n-th term of a geometric series is $a_n=a_1r^{n-1}$ Here, common ratio $r=\dfrac{a_2}{a_1}$ For $n=7$ Thus, $a_7=(5)(\dfrac{-1}{5})^{7-1}=\dfrac{1}{3125}=0.00032$