. Find the sum of the two middle most terms of theAP: -4/3,-1,-2/3-..,4 1/3

Question

. Find the sum of the two middle most terms of theAP: -4/3,-1,-2/3……,4 1/3

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Kinsley 1 month 2021-08-16T05:32:51+00:00 1 Answer 0 views 0

Answers ( )

  1. Ava
    0
    2021-08-16T05:34:50+00:00

    Step-by-step explanation:

    =

    3

    1

    d=

    3

    2

    2

    1

    =

    3

    1

    T

    n

    =a+(n−1)d

    3

    20

    =

    3

    1

    +(n−1)

    3

    1

    20=1+(n−1)

    20=1+n−1

    20=n

    Middle terms t=10,t=11

    T

    10

    =

    3

    1

    +(10−1)

    3

    1

    T

    10

    =

    3

    1

    +9(

    3

    1

    )

    T

    10

    =

    3

    10

    T

    11

    =

    3

    1

    +(11−1)

    3

    1

    T

    11

    =

    3

    1

    +10(

    3

    1

    )

    T

    11

    =

    3

    11

    T

    10

    +T

    11

    =

    3

    10

    +

    3

    11

    =

    3

    21

    =7

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