Question

Calcule a soma dos 10 primeiros termos da P.G (-3,-6,-12...)

Answer 1

q=2
A1=-3
n=10

A10=-3.2^10-1
A10=-3.2^9
A10=-3.512=-1536

S10=-3 (2^10 -1)/1
S10=-3.1023
S10=3069