An infinite geometric series has common ratio -1/3 and sum 25 What is the second term of the sequence?
S= a / (1 - r)
25 = a / (1 - (-1/3))
25 = a / (1 1/3)
a =25 x (1 1/3)
a =33 1/3 - This is the first term
33 1/3 x -1/3 =-11 1/9 This is the second term.
I think you mean -(11 1/9)
Yes that is what was written.
+145 
