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keelyjm

  • 2 years ago

Is my answer correct for this summation notation problem?

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

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

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

  4. keelyjm
    • 2 years ago
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    The only choices are n=0

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

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

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

  8. Kanwar245
    • 2 years ago
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    so the first two terms are positive?

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

  10. Jonask
    • 2 years ago
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    yes thats better

  11. keelyjm
    • 2 years ago
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    Okay I was not so sure. Thank you!

  12. Kanwar245
    • 2 years ago
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    thats not correct

  13. Kanwar245
    • 2 years ago
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    the first term will be 0, lol!

  14. terenzreignz
    • 2 years ago
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    No it won't...

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

  16. Kanwar245
    • 2 years ago
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    the series you gave had the first term 3

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

  18. Kanwar245
    • 2 years ago
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    anything to the power of 0 is 1!

  19. keelyjm
    • 2 years ago
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    and the first term was -4

  20. Kanwar245
    • 2 years ago
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    yeah I wrote it in that way

  21. Kanwar245
    • 2 years ago
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    there are more ways to write it

  22. Kanwar245
    • 2 years ago
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    I hope you see it.

  23. keelyjm
    • 2 years ago
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    It depends on if it is finite or infinite

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

  25. Kanwar245
    • 2 years ago
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    and that works too!!!!!!!!

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