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Sheff
Sheff asked in Science & MathematicsMathematics · 2 weeks ago

nth term in algebra?

One term of an arithmetic sequence is 𝑎9 = 25. The common difference is d = 4. Write a rule for the nth term.

3 Answers

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  • lenpol7
    Lv 7
    2 weeks ago

    #9 ; 4() + c = 25 

    #9 : 36 + c = 25 

    c = -11 

    Hence nth term is 4n - 11 

  • ?
    Lv 7
    2 weeks ago

    Write a rule for the nth term.

    One term of an arithmetic sequence is a9 = 25. 

    The common difference is d = 4. 

    -7, -3, 1, 5, ...

    a_n = 4 n - 11 

  • stanschim
    Lv 7
    2 weeks ago

    a9 = 25

    a8 = 21

    a7 = 17

    a6 = 13

    a5 = 9

    a4 = 5

    a3 = 1

    a2 = -3

    a1 = -7

    an = -7 + (n-1)4

    an = -7 + 4n - 4

    an = -11 + 4n

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