anonymous
  • anonymous
Find the sum of the first 7 terms of the geometric series -3, 6, -12, …
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
the pattern is multiplying each number by -2... so carry on after -12.
anonymous
  • anonymous
after you get to the 7th term, just add all the numbers together
anonymous
  • anonymous
I have to find the sum

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anonymous
  • anonymous
yeah after you find the 7th term by multiplying by -2 then you add all the numbers together to find the sum
anonymous
  • anonymous
-3, 6, -12 what's -12 times -2? it's 24. -3,6,-12,24 24 times -2? it's -48 -3, 6, -12, 24, -48 -48 times -2? it's 96 -3, 6, -12, 24, -48, 96 96 times -2? it's -192 -3, 6, -12, 24, -48, 96, -192 now add all 7 of those together to get the sum

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