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anonymous

  • one year ago

The first four terms of a sequence are shown below: 7, 4, 1, -2 Which of the following functions best defines this sequence?

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  1. anonymous
    • one year ago
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    i will give a gold medal

  2. freckles
    • one year ago
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    well I would check to see if it was arithmetic sequence first : do you have term-previous term=same number like I mean are all the following equal: 4-7=? 1-4=? -2-1=?

  3. anonymous
    • one year ago
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    hold up let me put the answeres in

  4. anonymous
    • one year ago
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    it wont let me copy and paste them in

  5. anonymous
    • one year ago
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    anyone?

  6. freckles
    • one year ago
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    well I asked you a question and you haven't answered yet so I don't know if you mean me or someone else because you don't understand what I'm asking you?

  7. freckles
    • one year ago
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    I'm asking you if all the differences are the same above 4-7=? 1-4=? -2-1=?

  8. freckles
    • one year ago
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    if we can establish all of these are the same then we have an arithmetic sequence and that means we have a common difference

  9. freckles
    • one year ago
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    \[a_n=a_1+d(n-1)\] d represents the common difference if there is one So I'm still asking you the following questions: 4-7=? 1-4=? -2-1=?

  10. anonymous
    • one year ago
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    i

  11. anonymous
    • one year ago
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    i have no idea what im doing lol

  12. freckles
    • one year ago
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    So you haven't done subtraction yet?

  13. freckles
    • one year ago
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    |dw:1438708092263:dw| do you want to try doing 1-4=? and -2-1=?

  14. freckles
    • one year ago
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    Come on... you have to know subtraction to know how to do this problem. You know 1-4 and -2-1 and 4-7 all have the same difference which is -3 -3 is your common difference you do have an arithmetic sequence use the equation I gave you above for a_n

  15. anonymous
    • one year ago
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    sorry computer turned off

  16. anonymous
    • one year ago
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    its -4

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