Created by StemPy LabAn arithmetic progression has its ninth term equal to five times its second term, while its twelfth term is 47. Find the total of its first twenty terms.
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← Consider all the two-digit natural numbers that leave a remainder of 3 when divided by 7. They form an arithmetic progression. What is the sum of all these numbers?An infinite geometric progression has a sum of 18, and its second term is 4. What are all the possible values of its first term? Choose the option that lists every possible value and no others. →
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