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72
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1979 IMO Longlists
Problems
(1)
Polynomial - f(x)=1979 four times - prove f(x) not= 2*1979
Source: ILL 1979 - Problem 72.
6/5/2011
Let
f
(
x
)
f (x)
f
(
x
)
be a polynomial with integer coefficients. Prove that if
f
(
x
)
=
1979
f (x)= 1979
f
(
x
)
=
1979
for four different integer values of
x
x
x
, then
f
(
x
)
f (x)
f
(
x
)
cannot be equal to
2
×
1979
2\times 1979
2
×
1979
for any integral value of
x
x
x
.
algebra
polynomial
calculus
integration
algebra unsolved