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anonymous

  • 5 years ago

write the arithmetic series 100+95+90+85+80 in summation notation.

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  1. myininaya
    • 5 years ago
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    \[\sum_{i=1}^{4}(100-5i)\]

  2. myininaya
    • 5 years ago
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    oops i=0 sorry

  3. anonymous
    • 5 years ago
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    \[\sum_{n=0}^{5}(80+5n)\]

  4. myininaya
    • 5 years ago
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    \[\sum_{i=0}^{4}(80+5i)\]

  5. myininaya
    • 5 years ago
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    you can use either 1 i mentioned but bout cases you have i=0 to 4 since you have 5 terms

  6. anonymous
    • 5 years ago
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    sorry....for that...thanks..

  7. myininaya
    • 5 years ago
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    np

  8. myininaya
    • 5 years ago
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    a made a mistake on first one i mentioned i went from i=1 to i=4 when i should had i=0 to i=4

  9. myininaya
    • 5 years ago
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    \[\sum_{i=15}^{20}5i\]

  10. myininaya
    • 5 years ago
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    i=16 to i=20

  11. myininaya
    • 5 years ago
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    there are probably some more you can write

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