Question

Write a possible explicit rule for the nth term of the sequence: 6, 9, 12, 15, 18, ...

a) a n = 3n - 3
b) an = 3 + 3n
c) an = 3 + 3an - 1
d) an = 3an - 1 - 3

Answer 1

formula = an+b

a = sequence
n = nth term
b= difference from 1st term and sequence

Answer 2

how would you plug in the numbers ?

Answer 3

you have a sequence of 3

the difference between the first digit (6) and sequence (3) = 3

so you have 3n + 3

Answer 4

i get it now thanks

Answer 5

yw :)