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purplemexican

  • one year ago

Find the sum of the given arithmetic series. 24 + 48 + 72 + 96 + ... + 480 a. 5280 c. 10080 b. 9576 d. 5040

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  1. anonymous
    • one year ago
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    \[480 = 24+ (n - 1) 24 \]

  2. anonymous
    • one year ago
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    \[S_n = \frac{ 19(24+480) }{ 2 } = ?\]

  3. Purplemexican
    • one year ago
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    4788

  4. anonymous
    • one year ago
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    doesn't seem to be in your option

  5. Purplemexican
    • one year ago
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    nope

  6. anonymous
    • one year ago
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    weird lol

  7. Purplemexican
    • one year ago
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    try the maths again maybe it was a miscalculation

  8. anonymous
    • one year ago
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    true enough

  9. anonymous
    • one year ago
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    its \[S _{20} = \frac{ 20(24+480) }{ 2 } =5040\]

  10. Purplemexican
    • one year ago
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    i think thats it

  11. Purplemexican
    • one year ago
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    thank you

  12. anonymous
    • one year ago
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    yw

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spraguer (Moderator)
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