anonymous
  • anonymous
What is the sum of the arithmetic sequence 8, 15, 22 …, if there are 26 terms?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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karatechopper
  • karatechopper
ok well first find the pattern
anonymous
  • anonymous
2483
karatechopper
  • karatechopper
:/ ok fine go with answer

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anonymous
  • anonymous
Sorry, I'm new here...
karatechopper
  • karatechopper
its ok:) im just kiddin:) would u like to take a tour of openstudy?
myininaya
  • myininaya
8 1st 8+7 2nd -> 1 seven 8+7+7 3rd -> 2 sevens 8+7+7+7 4th -> 3 sevens 8+7+7+7+7 5th -> 4 sevens .... so we have the answer can be found by looking at: We have 26 terms ( so we will have 25 sevens) 8+25(7) ---- Also ya we shouldn't just give the answer. We need to explain it okay @mathematicalnoob . thanks.
karatechopper
  • karatechopper
how about we take this in the chat:) lets let them work the math problem out
anonymous
  • anonymous
No at the moment, I'm actually waiting for an answer to my post so I can finish some homework but later :)
karatechopper
  • karatechopper
ok!:D
myininaya
  • myininaya
wait oops not finish one second
lgbasallote
  • lgbasallote
nice going there @karatechopper *wink* *wink* hehe
myininaya
  • myininaya
8, 8+7,8+2(7),8+3(7),....8+25(7) that term i gave you was the 26th term so we are still on our way to the correct answer
karatechopper
  • karatechopper
huh? @lgbasallote
myininaya
  • myininaya
\[\sum_{i=0}^{25}(8+i \cdot 7) \]
myininaya
  • myininaya
You should be able to get it from there using some formulas :)

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