- #1
SpatialVacancy
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Discrete Math Help!
Here is the problem:
Suppose a, b, and c are integers and x, y, and z are nonzero real numbers that satisfy the following equations:
[tex]\dfrac{xy}{x+y}=a [/tex] and [tex]\dfrac{xz}{x+z}=b [/tex] and [tex]\dfrac{yz}{y+z}=c [/tex].
Is x rational? If so, express it as a ratio of two integers.
I have calculated that [tex]x=\dfrac{-(bz-xz)}{b}[/tex]. I am inclined to answer no, since x, y, or z could be irrational.
Any help would be appreciated.
Here is the problem:
Suppose a, b, and c are integers and x, y, and z are nonzero real numbers that satisfy the following equations:
[tex]\dfrac{xy}{x+y}=a [/tex] and [tex]\dfrac{xz}{x+z}=b [/tex] and [tex]\dfrac{yz}{y+z}=c [/tex].
Is x rational? If so, express it as a ratio of two integers.
I have calculated that [tex]x=\dfrac{-(bz-xz)}{b}[/tex]. I am inclined to answer no, since x, y, or z could be irrational.
Any help would be appreciated.