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Problems
Contests
National and Regional Contests
USA Contests
MAA AMC
AMC 12/AHSME
1985 AMC 12/AHSME
21
21
Part of
1985 AMC 12/AHSME
Problems
(1)
Finding Integral Solutions
Source:
3/8/2009
How many integers
x
x
x
satisfy the equation (x^2 \minus{} x \minus{} 1)^{x \plus{} 2} \equal{} 1
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(
A
)
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2
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(
B
)
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3
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(
C
)
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4
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(
D
)
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5
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(
E
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none of these
<span class='latex-bold'>(A)</span>\ 2 \qquad <span class='latex-bold'>(B)</span>\ 3 \qquad <span class='latex-bold'>(C)</span>\ 4 \qquad <span class='latex-bold'>(D)</span>\ 5 \qquad <span class='latex-bold'>(E)</span>\ \text{none of these}
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(
A
)
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2
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(
B
)
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3
<
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(
C
)
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4
<
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(
D
)
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5
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(
E
)
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none of these
calculus
integration