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anonymous

  • one year ago

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, ...

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  1. anonymous
    • one year ago
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    The answer I got was 130 and 136.

  2. anonymous
    • one year ago
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    @Miracrown

  3. anonymous
    • one year ago
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    @abb0t

  4. anonymous
    • one year ago
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    how did you get two answers?

  5. anonymous
    • one year ago
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    Well, the first one I counted it all out and got 130. The second one I took 6*17 and got 136.

  6. anonymous
    • one year ago
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    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

  7. anonymous
    • one year ago
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    I got 96?

  8. anonymous
    • one year ago
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    No. can you show me your formula so I can see where you're going wrong?

  9. anonymous
    • one year ago
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    That's how it would look right?

  10. anonymous
    • one year ago
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    Oops.

  11. anonymous
    • one year ago
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    \[a _{n}=a _{1}+6(17-1)\]

  12. anonymous
    • one year ago
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    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

  13. anonymous
    • one year ago
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    Oh! Sorry, I side looked that. Let me try again

  14. anonymous
    • one year ago
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    ok. no problem

  15. anonymous
    • one year ago
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    128 is the answer I got.

  16. anonymous
    • one year ago
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    did you remember to add the 3 from a_1?

  17. anonymous
    • one year ago
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    Yes, I did :)

  18. anonymous
    • one year ago
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    Check your work to this |dw:1435109581581:dw|

  19. anonymous
    • one year ago
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    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!

  20. anonymous
    • one year ago
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    You're welcome

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