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If a sequence is defined by aₙ = 3n + (−1)ⁿ, what are its first four terms?यदि किसी अनुक्रम का नियम aₙ = 3n + (−1)ⁿ है, तो उसके पहले चार पद कौन-से हैं?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 2, 7, 8, 132, 7, 8, 13
The correct answer is A: 2, 7, 8, 13. Substituting n = 1, 2, 3, and 4 gives 3(1) − 1 = 2, 3(2) + 1 = 7, 3(3) − 1 = 8, and 3(4) + 1 = 13.सही उत्तर A: 2, 7, 8, 13 है। n = 1, 2, 3 और 4 रखने पर क्रमशः 3(1) − 1 = 2, 3(2) + 1 = 7, 3(3) − 1 = 8 और 3(4) + 1 = 13 मिलता है।
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