Posted by reema on .
find the 15th term of the sequence
9,27,81............

math 
bobpursley,
sequence is ar^n where a=9, r=(3)^n
15 term> is 9 the zeroth term, or first. Let it be first, then r=(3)^(n1)
so 15th term...(9)(3)^14=43 046 721