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Ireland National Math Olympiad
2004 Irish Math Olympiad
3
Find the digit
Find the digit
Source: Ireland 2004
January 2, 2007
Problem Statement
Suppose
n
n
n
is an integer
≥
2
\geq 2
≥
2
. Determine the first digit after the decimal point in the decimal expansion of the number
n
3
+
2
n
2
+
n
3
\sqrt[3]{n^{3}+2n^{2}+n}
3
n
3
+
2
n
2
+
n
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