Mathematics

Mathematics, 17.03.2021 23:50, jose477

R-2,R-1 and 3R are 6,7,and 8 terms of an arithmetic progression. Find the 1st term and the sum of 12th and 13th terms of progression

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R-2,R-1 and 3R are 6,7,and 8 terms of an arithmetic progression. Find the 1st term and the sum of 12...

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