Sunday, March 4, 2012

arithmic and geometric sequences

soo this week we learned about arithmic and geometric sequences. they are easy once you know the formulas and what the different terms aree.

Here are some things for arithmic
  • Arithmetic Sequence is a sequence that is generated by adding the same number ech time.
  • The formula for arithmetic is tn=t1 + (n-1) x d
  • d= what is being added or the difference.
  • tn= blank terms
Here are the things for geometric
  • Geometric Sequence is a sequence that is generated by mulitplying the same number each time.
  • The formula for geometric is tn=t1 x r^(n-1)
  • r= what is being mulitplied
  • n=term number
  • tn=blank terms
Here is an example of an arithmetic sequence

tn=2n+2
2(1)+2=4
2(2)+2=6
2(3)+2=8
2(4)+2=10

Here is an example of a geometric sequence

tn=2x3^n

2x3^1=6
2x3^2=12
2x3^3=24
2x3^4=48

bam! all done!

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