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anonymous

  • one year ago

What is the sum of the first n terms of this series? 4 + 6 + 8 + 10 + 12 + ⋯

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  1. anonymous
    • one year ago
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  2. DanJS
    • one year ago
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    notice when i=1 the term is 4, that will eliminate a couple answers off the bat

  3. DanJS
    • one year ago
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    They are asking for a sum up to nth term... \[\sum_{1}^{n}\]

  4. anonymous
    • one year ago
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    so if it doesn't equal 4 then I should eliminate that answer?

  5. DanJS
    • one year ago
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    Right, let i=1 and calculate the ( ) Quantity...

  6. DanJS
    • one year ago
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    Notice that each term increases by 2, that helps choose... ( something +2 ) maybe

  7. anonymous
    • one year ago
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    C?

  8. DanJS
    • one year ago
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    yes, the third one, but i sorta gave you the answer with those two infos, sorry

  9. anonymous
    • one year ago
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    since it's n instead of the infinity symbol and it's 2+2

  10. DanJS
    • one year ago
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    right, they want n terms, not the infinite sum

  11. anonymous
    • one year ago
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    I'm slow enough that I don't realize those things, lol. Thank you for your assistance!! xoxo.

  12. DanJS
    • one year ago
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    no prob,, goodluck

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