If the sum of the first 11 terms of an arithmetic progression equals that of the first 19 terms, then what is the sum of the first 30 terms?

Question

If the sum of the first 11 terms of an arithmetic progression equals that of the first 19 terms, then what is the sum of the first 30 terms?
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Solution 1

To solve this problem, we need to use the formula for the sum of an arithmetic progression, which is S_n = n/2 * (a + l), where S_n is the sum of the first n terms, a is the first term, and l is the last term.

Given that the sum of the first 11 terms equals the sum of the first 19 terms, we can wri Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study prob

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Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study problem.
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