Examples of Math Problems

examples of math problems that I like, solved, etc.

Showing posts with label Geometric Sequence. Show all posts
Showing posts with label Geometric Sequence. Show all posts

Thursday, January 16, 2014

A sequence has a third term of 18, and a common ratio of 3. What is the fifth term?

a%5B5%5D=a%5B3%5D%2Ar%5E%285-3%29=18%2A3%5E%282%29=162
Posted by Unknown at 12:51 PM No comments:
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Labels: Geometric Sequence, My Algebra.com posts

Saturday, August 17, 2013

What is the 8th term of sequence for the following: 200,-50,12.5,-3.125

r=-1%2F4
a%5B1%5D=200 
a%5Bn%5D=a%5B1%5Dr%5E%28n-1%29 

a%5B8%5D=200%2A%28-1%2F4%29%5E%288-1%29=-25%2F2048
Posted by Unknown at 12:21 AM No comments:
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Labels: Geometric Sequence, My Algebra.com posts

Friday, May 10, 2013

Is there a pattern for 81,108,144,...?


108/81=4/3
144/108=4/3

looks like it's a geometric sequence with a1=81:

%0D%0Aa%5Bn%5D=81%284%2F3%29%5En-1%0D%0A


:)
Posted by Unknown at 12:55 AM No comments:
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Labels: Geometric Sequence, My Algebra.com posts, PreCalculus, Sequences
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