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Triss [41]
3 years ago
9

Please help! I will give brainliest to the first correct answer!

Mathematics
1 answer:
Leviafan [203]3 years ago
6 0

Answer:

A)

Step-by-step explanation:

check that the formula in A works . . .

the 7th term should be 320

a(320) = 5(2)^7-1

= 5(2)^6

= 5(64)

= 320

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