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
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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) (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
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