Question

What is the 7th term of the geometric sequence where a1 = 625 and a3 = 25?


0.0016

0.2

0.008

0.04

Answer 1

\[a_n=a_1 \times r^{n-1}\]\[25=625 \times r^2\]\[r^2=0.04\]\[r=0.2\]
\[a_7=625 \times 0.2^{7-1}\]

Answer 2

So the answer would be 0.04?

Answer 3

yep

Answer 4

Thank you so much again!

Answer 5

=)