anonymous
  • anonymous
Only would like an explanation on how to get the Answer, I understand how to do it I just want to make sure I'm getting it right. Will Fan and Medal What is the 17th term of this sequence? 3, 11, 19, 27, 35, ...
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
The answer I got was 130 and 136.
anonymous
  • anonymous
@Miracrown
anonymous
  • anonymous
@abb0t

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anonymous
  • anonymous
how did you get two answers?
anonymous
  • anonymous
Well, the first one I counted it all out and got 130. The second one I took 6*17 and got 136.
anonymous
  • anonymous
You probably counted wrong the first time, and I'm not sure where the 6 came from. Either way there's a formula for this. \[a_n=a_1+d(n-1)\] a_1 is the first term of the sequence d is the difference between each term (for example 11-3) n is the term your looking for. You're looking for a_17, so n = 17 Try it out
anonymous
  • anonymous
I got 96?
anonymous
  • anonymous
No. can you show me your formula so I can see where you're going wrong?
anonymous
  • anonymous
That's how it would look right?
anonymous
  • anonymous
Oops.
anonymous
  • anonymous
\[a _{n}=a _{1}+6(17-1)\]
anonymous
  • anonymous
Two mistakes. a_1 is the first term of your sequence, which is 3. Also, you're using the wrong common difference. The pattern is adding 8, not 6. So d = 8
anonymous
  • anonymous
Oh! Sorry, I side looked that. Let me try again
anonymous
  • anonymous
ok. no problem
anonymous
  • anonymous
128 is the answer I got.
anonymous
  • anonymous
did you remember to add the 3 from a_1?
anonymous
  • anonymous
Yes, I did :)
anonymous
  • anonymous
Check your work to this |dw:1435109581581:dw|
anonymous
  • anonymous
Oh, I see what I missed! * Takes a screen shot of this so I can look back on it* Thank you so much! You've helped a lot!
anonymous
  • anonymous
You're welcome

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