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27 February, 14:20

Find the sum of the first fifteen terms of an arithmetic sequence if the middle term is 92.

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  1. 27 February, 14:33
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    I'll try to explain this as much as possible but 92 is x but you don't know y

    so it would be dermined this way I hope this makes sense

    15-8=7 So, this would mean that the term is 7th in place.

    92-7y+92+7y=92+92=184
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