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anonymous

  • one year ago

help please Evaluate S5 for 400 + 200 + 100 + … and select the correct answer below. 25 775 1,125 500

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  1. welshfella
    • one year ago
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    you can just find what the 4 th and 5th terms are then add them up Do you see the pattern?

  2. welshfella
    • one year ago
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    how do you get from 400 to 200 and from 200 to 100? what process is done on 400 and 200 to get the next number?

  3. welshfella
    • one year ago
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    and what would you do to 100 to get the next number in the series?

  4. anonymous
    • one year ago
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    would the answer be 25?

  5. welshfella
    • one year ago
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    No how could it be 25? S5 means the Sum of 5 terms

  6. anonymous
    • one year ago
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    Oh i don't know. so what would the answer be

  7. welshfella
    • one year ago
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    to get the next term in the series you multiply by 0.5 400 * 0.5 = 200 200 * 0.5 = 100 so what are the next 2 terms?

  8. welshfella
    • one year ago
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    0.5 * 100 = ?

  9. anonymous
    • one year ago
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    100 * 0.5 = 50 50 * 0.5 = 25

  10. welshfella
    • one year ago
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    exactly so you have the first 5 terms so all you have to do is add them up 400+ 200 etc

  11. welshfella
    • one year ago
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    can you do that S5 = 400+200+100+50+25

  12. anonymous
    • one year ago
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    yes i got it thank you

  13. welshfella
    • one year ago
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    yw

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