## iheartfood 2 years ago Which of the following sequences are geometric? A. 0.25, 0.35, 0.45, 0.55, 0.65 B. 3, 18, 108, 648, 3,888 C. 6, 1, 1/6, 1/36, 1/216 D. 1, 1/2, 1/3, 1/4, 1/5 **choose ALL that apply!! pls explain! thx :)

1. jim_thompson5910

look at choice A divide the second term by the first term

2. jim_thompson5910

what do you get

3. iheartfood

i got 1.4

4. iheartfood

0.35/0.25=1.4

5. jim_thompson5910

now divide the third number by the second number

6. iheartfood

0.45/0.35=1.285714286

7. jim_thompson5910

is that the same as the last result

8. iheartfood

noo :/

9. jim_thompson5910

so choice A isn't geometric

10. iheartfood

kk i see...

11. jim_thompson5910

each term divided by its previous term must give you the same number everytime

12. iheartfood

B is right?? cuz its all multiplied by 6 act time?

13. iheartfood

**each not act lol

14. jim_thompson5910

yep, B is definitely geometric

15. iheartfood

kk and so is C right?? i keep getting 1.66666666667 is C also geometric?

16. jim_thompson5910

yep

17. iheartfood

kk and D is not right?? so my answers are B and C?

18. jim_thompson5910

good

19. iheartfood

great! thanks :)