jumlah deret geometri tk hinga 8+4+2

a=8
r=
[tex] \frac{4}{8} [/tex]
=
[tex] \frac{1}{2} [/tex]
[tex] s \infty = \frac{a}{1 - r} [/tex]
8/1-1/2
8/1/2
8x2/1
=16