Respuesta:
S=1651129712640
termino 6=1990656
Explicación paso a paso:
t6=t1x[tex]q^{n-1}[/tex]
T6= 8x[tex]12^{6-1}[/tex]
T6=8x[tex]12^{5}[/tex]
t6=1990656
ahora termino 10
T10=8x[tex]12^{9}[/tex]
T10=41278242816
S= (t10+T1/2)10
S=320x[tex]12^{9}[/tex]
S=1651129712640
