sn=n(n+1) is used for finding the sum of whst type of AP​

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sn=n(n+1) is used for finding the sum of whst type of AP​

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Charlie 5 months 2021-12-29T16:59:37+00:00 2 Answers 0 views 0

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    0
    2021-12-29T17:00:45+00:00

    Step-by-step explanation:

    The sum of n terms of AP is the sum(addition) of first n terms of the arithmetic sequence. It is equal to n divided by 2 times the sum of twice the first term – ‘a’ and the product of the difference between second and first term-‘d’ also know as common difference, and (n-1), where n is numbers of terms to be added

    Hopes it help you❤️❤️

    0
    2021-12-29T17:01:01+00:00

    Answer:

    how to do…………

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18:9+8+9*3-7:3-1*13 = ? ( )