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PSYCHO15rus [73]
3 years ago
12

Find the sum of the geometric sequence -3,15,-75,375,... when there are 7 terms and select the correct answer below.

Mathematics
1 answer:
vivado [14]3 years ago
8 0

Answer:

-39,063

Step-by-step explanation:

In this geometric, sequence, you are multiplying by -5. So, we can continue the sequence by mulitplying 375(your last value) by -5 and so on, until we have 7 total terms.

Now we add the terms together:

-3+15+-75+375+-1875+9375+-46875

=-3+15-75+375-1875+9375-46875

=-39063

Hope this helps :)

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