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

User GisMofx
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Answer:

900

Explanation:

User Zephinzer
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