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Sphinxa [80]
3 years ago
6

what is the sum of the first 25 terms of an arithematic sequence if the sum of its 8th and 18th terms is 72?​

Mathematics
1 answer:
max2010maxim [7]3 years ago
7 0

Answer:

900

Step-by-step explanation:

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<h3>What is a confidence interval?</h3>

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