Odpowiedzi

2009-12-06T23:41:51+01:00
A1=-5
a2=-10

q=a2/a1
q=-10/(-5)
q=2

Sn=a1*(1-q^n)/(1-q)
Sn=-5*(1-2^n)/(1-2)
Sn=-5*(1-2^n)/(-1)
Sn=5*(1-2^n)
2009-12-06T23:42:26+01:00
A1 = -5
a2 = -10
q = a2/a1 = (-10)/(-5) = 2

Sn = a1 *[1 -q^n]/[1-q] = -5*[1- 2^n]/[1-2] = 5*[1 - 2^n]