A simple application of your formula ...
term(n) = a r^(n-1)
term(11) = 45 (.2)^10
= 45(.0000001024) = 0.000004608
or as an exact fraction:
term(11) = 45(1/5)^10
= 45/9765625
= 9/1953125
Find the 11th term of a geometric sequence if a1 = 45 (first term) and the common ratio r = 0.2.
1 answer