Question

find the 21st term of geometric sequence 2,6,18,54, is it 6973568802

Answer 1

so... what do you think is the common ratio?

Answer 2

6973568802 \(\large \checkmark\)

Answer 3

Brook: Finding a formula for the nth term of this geometric sequence would help you the most. You do need to determine what the "common ratio" is. What's your best definition of "common ratio" in this particular problem

Answer 4

Thanks everyyone !! <3

Answer 5

I'd be more comfortable if we had labeled that geometric sequence:

a(n) = ar^(n-1).

Answer 6

I did do that in my working out, but the answer seemed unreal so I had to double check