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4
2014 Team #4: Sum Involving the Floor Function
2014 Team #4: Sum Involving the Floor Function
Source:
March 2, 2014
function
floor function
Problem Statement
Compute
∑
k
=
0
100
⌊
2
100
2
50
+
2
k
⌋
.
\sum_{k=0}^{100}\left\lfloor\dfrac{2^{100}}{2^{50}+2^k}\right\rfloor.
k
=
0
∑
100
⌊
2
50
+
2
k
2
100
⌋
.
(Here, if
x
x
x
is a real number, then
⌊
x
⌋
\lfloor x\rfloor
⌊
x
⌋
denotes the largest integer less than or equal to
x
x
x
.)
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