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Math122333 Group Title

what is the nth term of the arithmetic series 3+7+11+15+19 Can you please explain to me step by step? Thanks a ton!!

  • one year ago
  • one year ago

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  1. rman3 Group Title
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    You can see each term increases by 4. The first one is given by taking the term number, multiplying by 4, and subtracting 1. 1x4-1=3 The same for the rest. 2x-4-1=7 So n times 4 minus 1 gives the nth term

    • one year ago
  2. rman3 Group Title
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    that's 2x4

    • one year ago
  3. nincompoop Group Title
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    TELLING YOU STEP-BY-STEP WILL NOT HELP SO MUCH. YOU HAVE TO READ THIS http://www.regentsprep.org/Regents/math/algtrig/ATP2/ArithSeq.htm

    • one year ago
  4. Math122333 Group Title
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    is there another way to get the nth term, rather then just looking at it and figuring it out?

    • one year ago
  5. nincompoop Group Title
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    WHEN I GIVE YOU SOMETHING TO READ, READ IT.

    • one year ago
  6. DMNTS Group Title
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    Answer is: 3+4n When n=0 you get 3, n=1 => 7, n=2 => 11 and so on...

    • one year ago
  7. Math122333 Group Title
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    the answer is 4n-1 nincompoop : from the link you gave me, #6 was very similar to my question but I don't think I can look at a problem and figure it out,since the problems will most likely be harder

    • one year ago
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