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Find the sum of first 8 …

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Find the sum of first 8 multiples of 3.

    • Posted by Anuj Patel 6 years, 9 months ago

    CBSE > Class 10 > Mathematics
    • 4 answers

    Yash Sharma ?? 6 years, 9 months ago

    108

    0Thank You

    Yogita Ingle 6 years, 9 months ago

    AP ; 3, 6 .....
    So, a = 3 and d= 6 -3 = 6

    Sn = n/2 [2a + (n-1) d]
    = 8/2 [2(3) + (8 - 1) 3

    Sn = 4 [6 + 21]
    = 4 ( 27)
    = 108

    0Thank You

    Harsimran Singh? 6 years, 9 months ago

    108...

    1Thank You

    #Miss_Raagini ???? 6 years, 9 months ago

    108

    0Thank You

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