Question

calcular a soma dos 4 termos primeiros termos da pg (9,9/2,9/4

Answer 1

Oi 

PG

u1 = 9
u2 = 9/2
u3 = 9/4 
u4 = 9/8 

S = 9 + 9/2 + 9/4 + 9/8 

S = 72/8 + 36/8 + 18/8 + 9/8 = 135/8 

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