the ratio of the 11th term to the 18th term of an AP is 2:3. find the ratio of the 5th term to the 21st term and also the ratio of sum of first 5terms to the sum of first 21st terms
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Step-by-step explanation:ratio of 5 th term to 21 at term is 1 : 3and ratio of sum of first 5 terms to sum of first 21 terms is 5: 14
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