a1=-3
q=-2
S5=a1 [(q^5)-1]/(q-1) =(-3)[(-2)^5-1] / (-2-1)= = -3(-32-1)/-3 = [-3(-32-1)]/-3=[-3(-33)]/-3= -33
Spr:
-3,+6,-12,-48 ,+96 = - 33
a1=-3
q=-2
S5=a1 [(q^5)-1]/(q-1) =(-3)[(-2)^5-1] / (-2-1)= = -3(-32-1)/-3 = [-3(-32-1)]/-3=[-3(-33)]/-3= -33
Spr:
-3,+6,-12,-48 ,+96 = - 33