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Poleng_InLove Group Title

There are three terms in Arithmetic Sequence . The common difference is 11 . A1=n-5 , A2=n-1 , and A3=2n . What are the terms ?

  • one year ago
  • one year ago

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  1. hartnn Group Title
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    common difference = A2-A1 = A3-A2 = 11

    • one year ago
  2. hartnn Group Title
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    A3-A2 = 11 2n - (n-1) =11 can you find 'n' from here ??

    • one year ago
  3. Poleng_InLove Group Title
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    Hmm ...

    • one year ago
  4. hartnn Group Title
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    was that a yes or no ?? O.o

    • one year ago
  5. Poleng_InLove Group Title
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    Wait .

    • one year ago
  6. hartnn Group Title
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    waiting...

    • one year ago
  7. agent0smith Group Title
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    A2 - A1 = 11 (n - 1) - (n -5) = 11 -1 + 5 = 11 no. 4 does not equal 11.

    • one year ago
  8. hartnn Group Title
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    ok...i guess, 11 as common difference(d) should naot have been given. in that case d = A2 - A1 = 4 then A3-A2 = 4 and find 'n'.

    • one year ago
  9. Poleng_InLove Group Title
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    How can I find the n ?

    • one year ago
  10. derek123 Group Title
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    why 4 again??

    • one year ago
  11. hartnn Group Title
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    common diff. always remains constant/same!

    • one year ago
  12. hartnn Group Title
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    2n - (n-1) =4

    • one year ago
  13. hartnn Group Title
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    n+1=4

    • one year ago
  14. derek123 Group Title
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    n=5??

    • one year ago
  15. hartnn Group Title
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    is 5+1 = 4 ??

    • one year ago
  16. Poleng_InLove Group Title
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    n=3 ?

    • one year ago
  17. hartnn Group Title
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    yes. n=3 :)

    • one year ago
  18. agent0smith Group Title
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    Yep, common difference of 4 works here.

    • one year ago
  19. Poleng_InLove Group Title
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    n-5=-2 n-1=2 2n=6

    • one year ago
  20. hartnn Group Title
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    \(\checkmark \)

    • one year ago
  21. derek123 Group Title
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    haha i used this d = A2 - A1 = 4

    • one year ago
  22. agent0smith Group Title
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    Note that we can't guarantee these are the correct answers, since... the question claims the difference is 11. Either that's wrong, or you didn't write out the question correctly.

    • one year ago
  23. Poleng_InLove Group Title
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    That's okay :))

    • one year ago
  24. derek123 Group Title
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    WHAT IF THE COMMON DIFFERENCE IS 9??

    • one year ago
  25. hartnn Group Title
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    from d = A2 - A1 the common diff. must be 4 cannot be anything else.

    • one year ago
  26. derek123 Group Title
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    OH WELL. xD

    • one year ago
  27. hartnn Group Title
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    did you ppl start learning sequences ??

    • one year ago
  28. derek123 Group Title
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    yup,xD arithmetic seq and series and mean and geom seq and series

    • one year ago
  29. derek123 Group Title
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    the formulae actually are mixing in my head. O_o

    • one year ago
  30. hartnn Group Title
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    then going through this might be helpful....http://openstudy.com/users/hartnn#/updates/503bb2a0e4b007f9003103b0

    • one year ago
  31. agent0smith Group Title
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    \[\large{\color{Blue}{T}\color{Yellow}{U}\color{Magenta}{T}\color{Pink}{O}\color{MidnightBlue}{R} I\color{Blue}{A}\color{Green}{L}!}\] ^^ Is it a tutorial on how to have a seizure? :P

    • one year ago
  32. amistre64 Group Title
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    nice "tutorial" :)

    • one year ago
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