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Verified answer
U2 = 88 = a * r
a = 8/r
U4 = 32
32 = a * r³
32 = 8/r * r³
32/8 = r³/r
4 = r²
r = 2
a = 8/2 = 4
U9 = a * r^8
U9 = 4 * 2^8 = 4 * 256 = 1.024 A
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