Question 882639
Tn = T1 * r^(n - 1)

r=3/2

3^9/2^10=1/2*3/2^(n-1)

3^9*2/2^10=3/2^(n-1)
3^9/2^9=3/2^(n-1)
(3/2)^9=3/2^(n-1)
9=n-1
10=n