Preciso de Cálculos!
a5=a1*q^4
162=a1*3^4
162=a1*81
162/81=a1
a1=2
Sn=2(162-1/2-1)
Sn=5*161
Sn=805
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Verified answer
a5=a1*q^4
162=a1*3^4
162=a1*81
162/81=a1
a1=2
Sn=2(162-1/2-1)
Sn=5*161
Sn=805