Question

find the 15th term in the geometric sequence below.
20,10,5,2.5,...

A: -(25/4096)
B: -(5/4096)
C: 5/4096
D: 25/4096

Answer 1

\( \color{Black}{\Rightarrow \large a_1 \times r^{n - 1}}\)

If you have a teacher, then use this crappy formula.

Answer 2

First term=20
R=0.5
Tn=ar^n-1
where a=first term , r=ratio ,n=number of the term

Answer 3

\( \color{Black}{\Rightarrow 20 \times 0.5^{14}}\)