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     EduGorilla 
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    What is the sum of the terms in a series whose nth term is given by 3n + 1?

    Options :-

    1. 1/2 .n. (3n + 5)
    2. 1/2 .n.(3n - 5)
    3. 1/4. n. (3n + 5)
    4. 1/3. n. (3n - 5)
    5. None of these
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