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Mathematics, 05.05.2020 07:26 Spuddle4403

I NEED HELP QUICK !! a1=8 ai=ai-1 *(-1.5) find sum of the first 20 terms in this geometric sequence


I NEED HELP QUICK !! a1=8 ai=ai-1 *(-1.5) find sum of the first 20 terms in this geometric sequence

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