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Postal Coaching
2005 Postal Coaching
24
An equation solutions
An equation solutions
Source: Indian Postal Coaching 2005
October 27, 2005
calculus
integration
number theory
number theory unsolved
Problem Statement
Find all nonnegative integers
x
,
y
x,y
x
,
y
such that
2
⋅
3
x
+
1
=
7
⋅
5
y
.
2 \cdot 3^{x} +1 = 7 \cdot 5^{y}.
2
⋅
3
x
+
1
=
7
⋅
5
y
.
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