2. The 7th term of an A.P is 27 and the 12th term is 47, what is the sequence?

Question

2. The 7th term of an A.P is 27 and the 12th term is 47, what is the sequence?

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Margaret 1 month 2021-10-13T19:21:17+00:00 1 Answer 0 views 0

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    2021-10-13T19:22:17+00:00

    Answer:

    3 + 4(n – 1)

    Step-by-step explanation:

    let r be the common differenc of the sequence

    Term 12 – Term 7 = (12 – 7)r

    then

    47 – 27 = 5r

    then

    20 = 5r

    then

    r = 4

    term 7 = term 1 + (7 – 1)r

    then

    27 = term 1 + 6r = term 1 + 24

    then

    Term1 = 27 – 24 = 3

    therefore

    the standard explicit formula of the sequence is :

    term 1 + (n – 1)r = 3 + 4(n – 1)

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45:7+7-4:2-5:5*4+35:2 =? ( )