Question

What is the recursive formula for 1, 4, 13, 40, 121, …?

Answer 1

@ganeshie8

Answer 2

will someone please help me with recursive formula i just want to know how it works

Answer 3

@zepdrix

Answer 4

@Zale101

Answer 5

@dan815

Answer 6

4=3*1+1

Answer 7

what?

Answer 8

13=3*4+1

Answer 9

what do you mean im coonfused

Answer 10

\[
a_2 = 3a_1+1,\quad a_3 = 3a_2+1,\quad a_4 = 3a_3+1
\]

Answer 11

what are you trying to tell me??

Answer 12

you might want to review what a recursive formula is

Answer 13

i did
http://www.regentsprep.org/Regents/math/algtrig/ATP3/Recursive.htm

Answer 14

it makes no sense to me

Answer 15

wio will try to help me understand this

Answer 16

If each term of a sequence changes by a common difference, d, what would a general rule for this type of sequence be?

Answer 17

i have no idea what that mean at all

Answer 18

\[\Large
a_2 = 3a_1 + 1 \implies a_2= 3a_{2-1} +1
\]