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What is formula of ap- Sum;

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What is formula of ap- Sum;

    • Posted by Dipanshu Kumar 7 years, 2 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Vanshika Gupta 7 years, 2 months ago

    n/2[2a+(n-1)d]=Sn or n/2(a+l)

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