9
Part of 2008 AMC 10
Problems(2)
Integer Fraction Conditions
Source: AMC 12 2008A Problem 5
2/17/2008
Suppose that
\frac {2x}{3} \minus{} \frac {x}{6}
is an integer. Which of the following statements must be true about ?
AMC
Quadratic
Source: AMC 10 2008B Problem 9
3/1/2008
A quadratic equation ax^2\minus{}2ax\plus{}b\equal{}0 has two real solutions. What is the average of the solutions?
(A)\ 1 \qquad
(B)\ 2 \qquad
(C)\ \frac{b}{a} \qquad
(D)\ \frac{2b}{a} \qquad
(E)\ \sqrt{2b\minus{}a}
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