Posted by ciara on .
what is the 10th term of the sequence 81,27,9 can someone please explain the steps.
possible answers;
1/729
1/243
1/81
1/810

algebra 
Steve,
a = 81
r = 1/3
so,
T10 = ar^9 = 81/3^9 = 3^4/3^9 = 1/3^5 = 1/243