
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
 LinkBack  Thread Tools  Display Modes 
January 3rd, 2019, 03:44 PM  #1 
Senior Member Joined: Dec 2015 From: iPhone Posts: 444 Thanks: 68  Simple sequence
Find nth term or function $\displaystyle f(n)$ that defines the sequence $\displaystyle 2,2,0,0,0,....\; \; $ (infinite zeros after second term) 
January 3rd, 2019, 06:26 PM  #2 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,148 Thanks: 1004 
Huh?

January 3rd, 2019, 06:39 PM  #3 
Global Moderator Joined: Dec 2006 Posts: 20,388 Thanks: 2015 
$\displaystyle f(n) = 1  \frac{2n  5}{2n  5}$, where $n$ is a positive integer.

January 4th, 2019, 05:16 AM  #4 
Senior Member Joined: Dec 2015 From: iPhone Posts: 444 Thanks: 68 
Another one is $\displaystyle f(n)=n \lfloor \frac{2}{n} \rfloor$

January 4th, 2019, 07:55 AM  #5 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,623 Thanks: 2611 Math Focus: Mainly analysis and algebra 
$$f(n) = \begin{cases}2 & ( n \le 2 ) \\ 0 & (n \gt 2)\end{cases} \qquad n \in \mathbb N$$

January 4th, 2019, 10:42 AM  #6 
Senior Member Joined: Dec 2015 From: iPhone Posts: 444 Thanks: 68 
Here comes the other one $\displaystyle f(n)=2\lfloor 2^{1} +n^{1} \rfloor$


Tags 
sequence, simple 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
trying to find a name for this simple sequence?  ggmmf000  Real Analysis  4  August 12th, 2017 12:02 AM 
Arithmetic Sequence & Geometric Sequence Question  Tomedb  Algebra  1  November 3rd, 2016 03:17 PM 
kind of silly/simple question with probably a simple answer.  GumDrop  Math  4  October 4th, 2016 04:34 PM 
Fibonacci sequence is connected to Prime sequence  Rahul k  New Users  2  May 12th, 2015 05:51 PM 
Super simple sequence question  gazing600000  Algebra  15  November 12th, 2014 11:26 PM 