what is the common ratio of 9 ,-3 ,1 ,-1/3
-1/3
In f(n)...
f(n) = -1/3x OR
f(n) = x/3
NOTE, IF THE LAST NUMBER WAS 1, WITH SIMPLE RATIOS THE NEXT NUMBER IS THE ANSWER!
The common ratio is given by the ratio of the following two terms :
an+ 1 / an
So.....we have
-3 / 9 = -1/3 = the common ratio ......verify for yourself that this ratio is consistent with the rest of the terms
