anonymous
  • anonymous
help please Evaluate S5 for 400 + 200 + 100 + … and select the correct answer below. 25 775 1,125 500
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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welshfella
  • welshfella
you can just find what the 4 th and 5th terms are then add them up Do you see the pattern?
welshfella
  • welshfella
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?
welshfella
  • welshfella
and what would you do to 100 to get the next number in the series?

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anonymous
  • anonymous
would the answer be 25?
welshfella
  • welshfella
No how could it be 25? S5 means the Sum of 5 terms
anonymous
  • anonymous
Oh i don't know. so what would the answer be
welshfella
  • welshfella
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?
welshfella
  • welshfella
0.5 * 100 = ?
anonymous
  • anonymous
100 * 0.5 = 50 50 * 0.5 = 25
welshfella
  • welshfella
exactly so you have the first 5 terms so all you have to do is add them up 400+ 200 etc
welshfella
  • welshfella
can you do that S5 = 400+200+100+50+25
anonymous
  • anonymous
yes i got it thank you
welshfella
  • welshfella
yw

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