5D Represent arthmetic series and geometric series using igm

.5D Represent arthmetic series and geometric series using igma notation 27. Use a graphing utility to find the sum of the geometric sequence. 12 k=1

Solution

24) -4 , 2 , 8 ----

common difference , d = 2 - (-4) =6

nth term an = a1 +(n-1)d

= -4 + (n-1)6 = 6n -6 -4 = 6n -10

So, tenth term = 6*10 -10 = 60-10 =50

Option C