arithmetic, geometric

Card Set Information

Author:
193nicole
ID:
9174
Filename:
arithmetic, geometric
Updated:
2010-03-04 19:25:51
Tags:
Math
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Description:
Geometric, arithmetc equations
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  1. Sum of an arithmetic sequence
    Sn=(n/2)(a1+an)
  2. nth term of an arithmeic sequence
    an=a1+(n-1)d
  3. recursive definiton of an arithmetic sequence
    • an=an-1+d
    • a1=a1
  4. Sum of fiest n intigers
    • n(n+1)
    • 2
  5. sum of first n perfect squares
    • n(n+1)(2n+1)
    • 6
  6. sum of first n perfect cubes
    • n2(n+1)2
    • 4
  7. nth term of a geometric sequence
    an=a1rn-1
  8. sum of finite geometric series
    • sn=a1(1-rn)
    • 1-r
  9. Sum of an infinite geometric series
    • S=a1
    • 1-r

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