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keelyjm

Is my answer correct for this summation notation problem?

  • one year ago
  • one year ago

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  1. keelyjm
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    Write the sum using summation notation, assuming the suggested pattern continues.1 - 3 + 9 - 27 + ...

    • one year ago
  2. keelyjm
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    |dw:1363357894822:dw| Is this correct?

    • one year ago
  3. Kanwar245
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    wait, n has to start from 1 and not 0

    • one year ago
  4. keelyjm
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    The only choices are n=0

    • one year ago
  5. Jonask
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    we shud notice that 1 is chanhing sign|dw:1363365221629:dw|

    • one year ago
  6. Kanwar245
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    can you rewrite the series, I think you have not written it correctly

    • one year ago
  7. keelyjm
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    no that is what it says. I copied and pasted the question.

    • one year ago
  8. Kanwar245
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    so the first two terms are positive?

    • one year ago
  9. keelyjm
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    No the first two terms are 1 and -3. Would this be better?|dw:1363358185671:dw|

    • one year ago
  10. Jonask
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    yes thats better

    • one year ago
  11. keelyjm
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    Okay I was not so sure. Thank you!

    • one year ago
  12. Kanwar245
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    thats not correct

    • one year ago
  13. Kanwar245
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    the first term will be 0, lol!

    • one year ago
  14. terenzreignz
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    No it won't...

    • one year ago
  15. keelyjm
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    not necessarily if you look at the summation question I asked before this.

    • one year ago
  16. Kanwar245
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    the series you gave had the first term 3

    • one year ago
  17. keelyjm
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    Write the sum using summation notation, assuming the suggested pattern continues. -4 + 5 + 14 + 23 + ... + 131 and the answer was \[\sum_{n=0}^{15}9n-4\]

    • one year ago
  18. Kanwar245
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    anything to the power of 0 is 1!

    • one year ago
  19. keelyjm
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    and the first term was -4

    • one year ago
  20. Kanwar245
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    yeah I wrote it in that way

    • one year ago
  21. Kanwar245
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    there are more ways to write it

    • one year ago
  22. Kanwar245
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    I hope you see it.

    • one year ago
  23. keelyjm
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    It depends on if it is finite or infinite

    • one year ago
  24. Kanwar245
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    for example I could have written \[\sum_{n=1}^{15}9(n-1)-4\]

    • one year ago
  25. Kanwar245
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    and that works too!!!!!!!!

    • one year ago
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