SOLUTION: Find the 97th term for the sequence: -3, -6, -12 I got as far as: a1=-3 r=2 an=3 x 2^n-1

Algebra ->  Sequences-and-series -> SOLUTION: Find the 97th term for the sequence: -3, -6, -12 I got as far as: a1=-3 r=2 an=3 x 2^n-1      Log On


   

Question 1082582: Find the 97th term for the sequence: -3, -6, -12
I got as far as: a1=-3 r=2
an=3 x 2^n-1
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
-3, -6, -12
If I say the general form for the sequence is:
+a%5Bn%5D+=+a%5B1%5D%2Ar%5E%28+n-1+%29+
n = 1,2,3,4 . . .
--------------------
+a+=+-3+
+r+=+2+
-----------------
Find +a%5B97%5D+
+a%5B97%5D+=+-3%2A2%5E96+
This is too big a number for my caculator
There might be an online calculator that
can do this.