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mgirl211

  • 3 years ago

Find the indicated sum for the arithmetic series. S18 for 13 + 2 + (-9) + (-20) + ...

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  1. lilg132
    • 3 years ago
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    13 + (18 - 1) -11 s18 = -174

  2. mgirl211
    • 3 years ago
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    That is not an option :/ the only options are -873, -1528, -256, and -1449

  3. lilg132
    • 3 years ago
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    hmm thats strange

  4. mgirl211
    • 3 years ago
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    Yeah, Thanks anyways though. I appreciate it greatly.

  5. lilg132
    • 3 years ago
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    are you sure you typed the question correctly? if i understand correctly your looking for the 18th term?

  6. mgirl211
    • 3 years ago
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    No, I'm looking for the sum of the series to the 18th term

  7. lilg132
    • 3 years ago
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    ok let me work it out give me a moment

  8. mgirl211
    • 3 years ago
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    Take your time

  9. lilg132
    • 3 years ago
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    -1449

  10. mgirl211
    • 3 years ago
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    Thank you :)

  11. lilg132
    • 3 years ago
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    remember to click good answer Megan :p

  12. lilg132
    • 3 years ago
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    your welcome

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