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Rajan@2021
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Find the nth term and 12th term of the list numbers:5,2,-1,-4,…..

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One of the most important question of important chapter for board examination
Find the nth term and 12th term of the list numbers:5,2,-1,-4,…..
ML Publication, Exercise 9, arithmetic progression

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1 Answer

  1. From the question,
    The first term a=5
    Then, difference d=25=3
    −13=−3−4(−1)=−4+1=−3
    Therefore, common difference d=3 From the formula,
    an=a+(n1)d
    Tn= So, T12a+(n1)d=5+(n1)(−3)=53n+3=83n=a+(121)d=5+(121)(−3)=5+(11)3=533=−28

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