Question

Find the nth term of the geometric sequence:
a_2 or a[2]=3, a_5 or a[5]=(3/64), n=1

Answer 1

@satellite73

Answer 2

@bahrom7893 anything? haha

Answer 3

I literally know the equation if you have a[1], but nothing when you're solving for a[1]

Answer 4

http://screensnapr.com/v/3ZOlWC.png maybe this will help

Answer 5

Because the equation while using a[1], is a[n]=a[1]r^(n-1)

Answer 6

a2=a1*r=3; a1=3/r

Answer 7

just do the same thing as the solved example.. or is there a trick somewhere?

Answer 8

And solving for r now.. other example doesn't make that much sense to me, and I feel like there is a trick because n-1, 1-1=0.

Answer 9

and anything to the power of 0 is 1, so a[1]*1=a[1]..?

Answer 10

r is either powers of 4 or 2..

Answer 11

Hmm..?

Answer 12

hang on..

Answer 13

r=1/4, a1=3/1/4=12

Answer 14

a2=3=a1r
a1=3/r

Answer 15

a5=a1r^4=a1rr^3=3r^3=3/64

Answer 16

r^3=1/64
r=1/4

Answer 17

a1=3/r=3/1/4=12

Answer 18

Got it! Thank you so much haha, stumped me

Answer 19

i don't even know why they give u n, it's totally irrelevant imo

Answer 20

Got another question, that literally has nothing to do with anything..

Answer 21

Posted it