Find the sum of the given ap 20 ,13,6, −1,…..18 terms
pls give the right answer
no spam
for gods sake .

Question

Find the sum of the given ap 20 ,13,6, −1,…..18 terms
pls give the right answer
no spam
for gods sake .

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Adeline 2 years 2021-07-24T05:16:13+00:00 2 Answers 0 views 0

Answers ( )

  1. Kinsley
    0
    2021-07-24T05:17:23+00:00
    Reply

    Answer:

    711

    Step-by-step explanation:

    given : ap:20,13,6,-1

    a=20

    d=13-20=-7

    n=18

    sn=?

    formula

    sn=n/2[2a+(n-1)d]

    sn=18/2[2(20)+(18-1)-7]

    sn=9[40+19*-7]

    sn=9[40-119]

    sn=9[79]

    sn=711

  2. Sophia
    0
    2021-07-24T05:18:09+00:00
    Reply

    Answer:

    a=20

    d= -7

    n=18

    put the values in the formula and you will get answer

    n/2[2a + (n – 1)d]

    Step-by-step explanation:

    this formula is used to find sum of terms of ap for a given value of n…which is number of terms

    now I have helped you…no spam…no joke i had put

    Please mark me as brainliest…may god bless you

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