## anonymous 5 years ago Given the sequence 6, 18, 54, 162, ..., which expression would give the fifteenth term?.

1. anonymous

first term is 6, second term is 3x6, third it 3^2x6, so 14th is 3^13x6

2. anonymous

$6*3^{14}=28697814$

3. anonymous

oh sorry 15th term is just 3^(14)x6

4. anonymous

$T_n=6 \times 3^{n-1}$

5. anonymous

foolfor the nth term gets a medal

6. anonymous

Tn=ar^n-1

7. anonymous

n=position of the term r=common ratio a=value of the first term

8. anonymous

It is a geometric progression

9. anonymous