The first term of a geometric sequence is 160, and the common ratio is 0.5. What is the 5th term of the sequence?
1 Answer
Jan 25, 2016
10
Explanation:
The nth term of a geometric sequence is found using
# u_n = ar^(n-1) # where a is the first term , r , the common ratio and n the nth term.
here a = 160 , r = 0.5 and n = 5
hence :
#u_5 = 160 (0.5)^4 = 10#
