Respuesta :

ghanami

Answer:

Step-by-step explanation:

hello :

the nth terme is :An = A1×r^(n-1)     ...A1=8 and r=4

An = 8×(4)^(n-1)

the  fourth term when : n= 4   so  A7 = 8×(4)^(4-1) =8×(4)^(3) = 512

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