Question

Which sequence has 3n as its nth term?

3, 9, 15, 29, 46, …

3, 4, 5, 6, 7, 8, …

3, 6, 9, 12, 15, 18, 21, …

3, 9, 27, 81, 343, 729, …

Answer 1

@kidrah69

Answer 2

do you know that 3n means 3 times n ?

if n was 1, what is 3*n ?

Answer 3

3?

Answer 4

yes. that means the first term (i.e. when n is 1) you get 3
now what is 3*n when n is 2 ?

Answer 5

6

Answer 6

and just to be sure,
what is 3*n when n is 3 ?

Answer 7

so therefor it would be D
and it would be 9

Answer 8

not sure how you get D
but yes, look for 3,6,9,...

Answer 9

I thought it would be D because you would put your answer in for n

Answer 10

I assume by D you mean the 4th choice
3, 9, 27, 81, 343, 729, …
?
that is not 3,6,9,...

Answer 11

I know but i thought you put in your answer for n so therefore making it 3*3=9
and then 3*9 and so on

Answer 12

ok, first, each term has a number, starting with 1
the "nth" term is generic for look at the term labeled "n"

when we say the "nth term" is 3n
that "rule" has to work for any n.
in other words, it has to work for n=1, for n=2, for n=3

or do say it another way,
the sequence is
3,6,9,12, etc

Answer 13

Oooo that makes sense thanks so much @phi you're awesome!!

Answer 14

the last one

Answer 15

It is a way of speaking, and sometimes getting used to the goofy writing is half the battle.

Answer 16

can you help with another?

Answer 17

btw, I hope you did not mean
the nth term is \(3^n\)
did you?

Answer 18

no

Answer 19

ok, because (obviously) you get different numbers (the last choice, D) if the question was
\( 3^n\)