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PEN G Problems
17
G 17
G 17
Source:
May 25, 2007
inequalities
logarithms
Irrational numbers
Problem Statement
Suppose that
p
,
q
∈
N
p, q \in \mathbb{N}
p
,
q
∈
N
satisfy the inequality
exp
(
1
)
⋅
(
p
+
q
−
q
)
2
<
1.
\exp(1)\cdot( \sqrt{p+q}-\sqrt{q})^{2}<1.
exp
(
1
)
⋅
(
p
+
q
−
q
)
2
<
1.
Show that
ln
(
1
+
p
q
)
\ln \left(1+\frac{p}{q}\right)
ln
(
1
+
q
p
)
is irrational.
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