Respuesta :

valerieulbrich

Answer:

6

Step-by-step explanation:

[tex]S_{n}[/tex] = [tex]\frac{a(1-r^{n}) }{1-r}[/tex]

63 = -3(1 - [tex]-2^{n}[/tex]) / (1- -2)

63 = (-3 + [tex]6^{n}[/tex])/3

63 = -1 + [tex]2^{n}[/tex]

64 = [tex]2^{n}[/tex]

n = 6
N should equal 6.Everything added up to 6 with my calculations