SOLUTION: Can I know what particular equation can I use to find the nth term of this sequence? 5,12,31,68,129

Algebra.Com
Question 1061052: Can I know what particular equation can I use to find the nth term of this sequence? 5,12,31,68,129
Answer by Edwin McCravy(20065)   (Show Source): You can put this solution on YOUR website!

5,12,31,68,129

Let's get a related sequence with the first term 1, 
by subtracting 4 from each term

1,8,27,64,125

Hey! Those are the cubes:

13,23,33,43,53

So we just add 4 to n3, and we have the general term:



Edwin
RELATED QUESTIONS

I would like to know what formula can I use to solve the nth term of this particular... (answered by Edwin McCravy,rothauserc)
what is the sequence of this (2, 3, 4, 5, 7, 8 ,9, 10, 11, 13, 14, 15, 16 ,17, 19, 21,... (answered by richard1234)
I have the sequence 2,5,9,14,20,27,35,44... How can I find an explicit formula to find (answered by stanbon,0123456)
for the sequence 12, 15, 18, 21........ what is the equation to find the nth term of the (answered by Fombitz)
The sum of the first two terms of a seven-term GP (geometric progression) is 20 and the... (answered by stanbon)
hi i was asked to find: 1. the nth term for this sequence 1/2,1/4,1/6,1/8, 2.if its... (answered by MathLover1,MathGeek87)
Use the geometric sequence of numbers 1, 3, 9, 27 … to find the following: a) What is... (answered by jim_thompson5910)
The infinite geometric sequence which begins: (2^300),(2^298),(2^296),(2^294)...... (answered by joyofmath)
This is a long one I know, can someone please help me with this one? Use the... (answered by jim_thompson5910)