Question 59091
a.
3/1 = 9/3 = 27/9  R = 3

b.
Tn (Nth Term) = ar^n-1 

a=3  n=10

T10= 1 * 3^10-1 = 3^9

C. 
Sn = ar^n-1/r - 1

   = 1*3^9/3-1 = 3^9/2