Recent content by rockdrummer5206

Alright so i'm supposed to write the expression for the nth term of the geometric sequence and find the sum of the first 20 terms of the sequence... for problem 65 is tells me that a (subscript)1 = 16 and a (subscript)2 = -8 I then figured that r is = to -2 so my expression is Sn=16(-1/2)^20-1...