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1 реж рен00) el B BN KL. b N oniadie Jeren |
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Answer» We know a, b, c are in AP then 2b = a + c So, here 2(2k - 1) = k + 9 + 2k + 7 4k - 2 = 3k + 16 4k - 3k = 16 + 2 k = 18 |
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