SOLUTION: Write the expression below in expanded form and then find the sum: 3 Σ (4^k-1) k=1 1 + 4 + 16 = 21 1 + 3 + 9 + 27 = 40 1 + 1/4 + 1/16 = 21/16 4 + 16 + 64 = 84

Algebra ->  Finance -> SOLUTION: Write the expression below in expanded form and then find the sum: 3 Σ (4^k-1) k=1 1 + 4 + 16 = 21 1 + 3 + 9 + 27 = 40 1 + 1/4 + 1/16 = 21/16 4 + 16 + 64 = 84      Log On


   

Question 1035616: Write the expression below in expanded form and then find the sum:
3
Σ (4^k-1)
k=1
1 + 4 + 16 = 21
1 + 3 + 9 + 27 = 40
1 + 1/4 + 1/16 = 21/16
4 + 16 + 64 = 84
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Write the expression below in expanded form and then find the sum:
3
Σ (4^k-1)
k=1
-----------------
Sub 1 for k: --> 4^0 = 1
etc
=================
1 + 4 + 16 = 21
1 + 3 + 9 + 27 = 40
1 + 1/4 + 1/16 = 21/16
4 + 16 + 64 = 84