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3 years ago

11

HELP ILL MARK BRAINLEST

1 answer:

kolbaska11 [484]3 years ago

6 0

Answer: -1280

------------------------

Work Shown:

a(n) = a*r^(n-1)
a(n) = -10*2^(n-1)
a(8) = -10*2^(8-1)
a(8) = -10*2^7
a(8) = -10*128
a(8) = -1280

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