anonymous
  • anonymous
Find S12 for the series 1 + 2 + 4 + 8 +.. i got 2048
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
@Michele_Laino am i right
Michele_Laino
  • Michele_Laino
here we have a geometric series, whose first term is a1=1 and constant q= 2
anonymous
  • anonymous
okay

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Michele_Laino
  • Michele_Laino
so, we can apply this formula: \[\Large {S_{12}} = {a_1}\frac{{1 - {q^{12}}}}{{1 - q}}\]
anonymous
  • anonymous
okay
Michele_Laino
  • Michele_Laino
after a substitution, i get this: \[\Large {S_{12}} = {a_1}\frac{{1 - {q^{12}}}}{{1 - q}} = 1 \cdot \frac{{1 - {2^{12}}}}{{1 - 2}} = ...?\]
anonymous
  • anonymous
-4097
Michele_Laino
  • Michele_Laino
I got 4095
anonymous
  • anonymous
nvm ur right, typo sorry lol
anonymous
  • anonymous
so its 4095
Michele_Laino
  • Michele_Laino
yes!

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