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9. Which terın of the AP 18,23,28,33.is 982a. 15thb. 16thc. 17thd. 18th |
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Answer» An AP 18 , 23 , 28 , 33 , .....OPTIONS :a. 15thb. 16THC. 17thd. 18thSolution :★══════════════════════★NTH term of an AP is given by ,Where ,a DENOTES first termn denotes nth term valued denotes common difference★══════════════════════★Here , a = 18d = 23 - 18 = 5N = ?aₙ = 98➠ 98 = 18 + (n - 1)5➠ 98 = 18 + 5n - 5➠ 5n + 18 = 98 + 5➠ 5n + 18 = 103➠ 5n = 103 - 18➠ 5n = 85➠ n = 1717th term of the given AP is 98Option C |
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