Question

Find the common ratio for the following sequence. 27, 9, 3, 1, ... User: Find the common ratio for the following sequence. 1/2,-1/4, 1/8, -1/16 User: What is the seventh term of a sequence whose first term is 1 and whose common ratio is 3? 243 729 2,187

Answer 1

Answer:

My answer is 1/3 !!!!! Lmk if it's right or not

Answer 2

R=common ratio= an / an-1
27,9,3,1.....;
 r=an/an-1= a₂/a₁=9/27=1/3

r=1/3.


1/2,-1/4,1/8,-1/16
r=an/an-1=(-1/4) / (1/2)=-2/4=-1/2

r=-1/2.

a₁=1
r=3
an=a₁*r^(n-1)
a₇=1.3⁷⁻¹=3⁶=729

a₇=729